| Course | AC503 Advanced Auditing |
|---|---|
| Unit | Unit 7 |
| Paper type | Analytical procedures exercise |
| Length | About 620 words, 5 pages double-spaced |
| Format | APA 7 student paper |
| School | Purdue University Global |
| Program | MS in Accounting |
| Updated | October 2026 |
Free sample paper for AC503 Unit 7
An Expectation Built From Pallets: A Unit 7 Analytical Procedures Exercise on $52.4 Million of Storage Revenue
[Student Name]
Purdue University Global
AC503: Advanced Auditing
Unit 7 Analytical Procedures Exercise
[Instructor Name]
[Date]
Polar Ridge Cold Logistics and every figure are composite; the standards and textbook cited are real.
The Expectation Model
The model is a grid of 36 cells, three facilities by twelve months. Each cell multiplies the occupied pallet positions in that facility's month-end snapshot by the average contracted storage rate for its customer mix, then adds handling fees on the pallets received that month at the contracted handling rate. The rates come from signed customer contracts, not from the billing system, so that an error in the system's rate table cannot flow into both the expectation and the recorded amount. Summed, the grid gives $51,910,000.
Because a weak data source would make any expectation meaningless, the snapshot data was tested before the model used it. The IT audit specialist tested general controls over the warehouse management system, including access and change management for the pallet tables. In addition, one month's snapshot at the largest facility was agreed to pallet counts taken during an unannounced visit in October, with no differences beyond normal movement (American Institute of Certified Public Accountants [AICPA], 2012).
The Threshold
The threshold, the difference the team will accept without further investigation, is $150,000, about 30 percent of performance materiality. It is set low because the combined risk for storage revenue is high and the rate-change control failed in Unit 4, leaving the analytics as a main source of evidence. A threshold set after seeing the recorded amount would be worthless, so this one was approved by the senior and filed before the comparison was made.
The Comparison
Recorded revenue is $52,380,000, exceeding the expectation by $470,000. That is more than three times the threshold, so the whole difference must be investigated and either corroborated or treated as a possible misstatement.
Investigating the Difference
Two causes were found and corroborated. First, blast freezing charges of $283,600, billed when customers' goods arrived warm and had to be frozen quickly, are recorded in storage revenue but were not in the model. They were traced to blast freezer logs and customer invoices for three months and agreed in total to a billing report. Second, $186,400 traces to the four customers whose rates were raised on November 3 under the administrator account without approval or contract amendments. Rebuilding those customers' November and December invoices at their contracted rates reduced their billings by exactly that amount.
The analytics found the same four customers the control test found, from a completely different direction, which turns a control failure into a measured misstatement of $186,400.
Why the Model Is Precise Enough
An expectation must be precise enough to reveal a misstatement of the size the threshold allows. Building the model by facility and month, rather than as one annual figure, keeps errors from offsetting one another: an overbilled customer at one warehouse cannot hide behind a slow month at another. Using contracted rates rather than last year's average rate removes the effect of price changes from the comparison. The model's main weakness is that it ignores accessorial charges, which this exercise has now added.
Conclusion
After the blast freezing charges are added to the model, the remaining difference is $186,400, which is a misstatement, not an unexplained variance: storage revenue and receivables are overstated by that amount unless the customers agree to the new rates. The amount goes to the summary of misstatements and to the control deficiency evaluation. The model, corrected for blast freezing, will be reused next year (Arens et al., 2020; AICPA, 2021).
References
American Institute of Certified Public Accountants. (2012). Analytical procedures (AU-C Section 520). AICPA.
American Institute of Certified Public Accountants. (2021). Understanding the entity and its environment and assessing the risks of material misstatement (Statement on Auditing Standards No. 145). AICPA.
Arens, A. A., Elder, R. J., Beasley, M. S., & Hogan, C. E. (2020). Auditing and assurance services (17th ed.). Pearson.
The Purdue Global AC503 Unit 7 instructions
The seventh AC503 unit asks you to perform a substantive analytical procedure from expectation to conclusion. Build an expectation from data independent of the amount being tested, at a level of detail fine enough to reveal misstatement, such as by location and month. Test the reliability of the data you use, including relevant IT controls. Set the threshold for acceptable differences before comparing the expectation with the recorded amount, and explain how it relates to performance materiality and the assessed risk. Compare, then investigate any difference above the threshold until each part is corroborated with evidence or treated as a misstatement. Explain whether the model was precise enough. Conclude on the account and note any misstatement found. List the analytical procedures and risk standards and the textbook as APA 7 references.
How this AC503 Unit 7 example is built
The sample's model is a 36-cell grid of three facilities by twelve months, using contracted rates from signed contracts so system rate errors cannot affect both sides. Data reliability is supported by IT general controls and an unannounced pallet count. The threshold page sets $150,000, about 30 percent of performance materiality, approved before comparison. The comparison shows a $470,000 excess. Investigation traces $283,600 to blast freezing charges confirmed through freezer logs and invoices, and $186,400 to the four customers whose rates were raised without approval. The highlighted sentence links this result to the control test. A precision section explains the grid's design, and the conclusion records the misstatement.
Where the points sit in the AC503 Unit 7 rubric
Analytical procedures in AC503 earn points for a genuinely independent expectation and disciplined investigation. Graders check that the data is tested before use and that the expectation is detailed enough to detect the misstatement the threshold allows. The threshold must be set in advance and justified by risk. Every difference above it must be explained with corroborating evidence, not accepted on management's word. The rubric rewards connecting findings to other procedures, such as a failed control. Exercises that compare this year with last year and call that an expectation, or that set the threshold after seeing results, earn little. The two standards used should appear as APA 7 references.
Common AC503 Unit 7 mistakes, and how to avoid them
Many Unit 7 exercises use last year's revenue adjusted by a growth rate, which is too imprecise to detect anything. The model draws on the same system data being tested, so it cannot reveal system errors. Data reliability is assumed. The threshold is chosen after the comparison, or set at materiality so nothing needs investigation. Differences are explained by inquiry alone. A difference that cannot be explained is called immaterial instead of being treated as a possible misstatement. If your section supplied a different account or data set, such as payroll or interest expense, we can build the model from your figures and investigation from your figures.
Get an AC503 Unit 7 example written to your instructions
Provide the account and the operating data given in the Unit 7 case, any threshold guidance, and the rubric. The exercise fixes its expectation and threshold ahead of any look at the recorded balance, then investigates and corroborates every difference above it, within 24-48h. There is no charge for a first custom sample drawn from your data. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
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AC503 Unit 7 questions, answered
How is the threshold for investigation chosen?
By judgment tied to materiality, the assurance wanted from the procedure and the precision of the expectation. It sits below performance materiality when the procedure provides substantial evidence on its own. The AC503 example sets 150,000, roughly a third of performance materiality, and explains that a less precise annual model would have needed a lower figure or other procedures.
Why disaggregate by month and facility?
Because a finer model makes errors harder to hide. An annual total can match even when one facility is overbilled and another underbilled. Thirty-six cells expose where a difference sits, which is how the example traced most of the gap to one facility in one quarter and found its cause in a billing code.
Is management's explanation enough?
Not without corroboration. The analytical procedures standard requires the auditor to obtain evidence supporting explanations for significant differences. The example accepts the blast-freezing explanation only after tracing invoices to freezer-cell logs and quantifying the effect, which left a residual it could then compare with the threshold set in advance, and the explanation became evidence rather than an assertion.
Where can I find a free AC503 Unit 7 sample paper?
This page holds a full AC503 Unit 7 analytical procedures exercise for Polar Ridge Cold Logistics with a pallet-based expectation, a preset threshold, a $470,000 difference investigated and APA 7 references.
Why use contracted rates instead of the billing system's rates?
Because the rate-change control failed, the billing system's rate table may itself be wrong. Rates from signed contracts are independent of that table, so an unapproved rate shows up as a difference instead of being built into the expectation.