In AC420's Unit 7 standard cost variance analysis, a three-part iron charge yields price, mix and yield variances, labor adds rate and efficiency, and each carries one cause. Searches like "ac 420 unit 7 assignment example", "ac420 unit 7 sample" and "ac420 unit 7 example" land here.
What a finished AC420 Unit 7 standard cost variance analysis looks like
A standard cost card leads: 55 percent steel scrap at 0.21 dollars a pound, 25 percent pig iron at 0.38, 20 percent foundry returns at 0.12, a blended 0.2345, and a standard yield of 72 pounds of good castings per 100 poured. Allowed input for the month is 300,000 pounds. The price block follows input by input, 2,400 unfavorable on scrap and 882 favorable on pig iron. The quantity block splits in two: a mix variance of 3,485 unfavorable, because pig iron rose to 31.6 percent of the charge, and a yield variance of 2,345 unfavorable, with 310,000 pounds poured for a 69.68 percent yield. Labor carries a rate variance of 1,603 and an efficiency variance of 3,432, both unfavorable. A cause table closes the analysis.
How a AC420 Unit 7 example is structured
Flexing comes before any variance. The month planned 230,000 pounds of good castings and produced 216,000, so the static materials budget of 74,909.72 dollars would credit the melt shop with 4,559.72 of savings it never earned. Price variances are taken on actual quantities for each input separately, since scrap and pig iron are bought in different markets and the two moved in opposite directions. The quantity variance is then split at standard prices, mix holding total pounds at actual and yield comparing actual pounds with allowed. Both pieces are reconciled to the undivided quantity variance of 5,830 so a reader sees nothing was lost in the split. Labor follows in the same layout. The cause table links rather than lists: a contaminated scrap delivery explains the pig iron substitution, and the defects that followed explain both the yield loss and the extra labor hours.
A charge recipe as the standard
Three inputs in fixed proportions, a blended 0.2345 dollars a pound and a 72 percent yield, so good output rather than metal melted sets the allowance.
Flexed to 216,000 good pounds
Allowed input of 300,000 pounds replaces the plan built for 230,000, removing a volume effect of 4,559.72 dollars from the comparison.
Two markets, two prices
Steel scrap 2,400 unfavorable as shredded prices rose; pig iron 882 favorable under a fixed contract. Returns carry an internal value and show no price variance.
Mix, then yield
3,485 dollars unfavorable from a heavier pig iron share and 2,345 from pouring 310,000 pounds for output that should have taken 300,000. Together they equal the full quantity variance.
Labor rate and hours
A contract wage step of 0.70 an hour not yet built into the standard, and 130 extra hours spent repouring defective molds.
One delivery, several variances
The cause table traces mix, yield and efficiency to one scrap load with off-specification chemistry, naming purchasing, the melt supervisor and quality as the roles to confirm it.
Where marks go in AC420 Unit 7
Treating the charge as one material and reporting a single quantity variance forfeits the part of the problem this upper-level course adds. Where the split is attempted, the usual failure is a mix variance priced at actual rather than standard prices, which lets price effects leak into a quantity measure; the reconciliation to 5,830 dollars catches it at once. Comparing actual cost with the static budget costs credit in almost every section. Sign handling matters on a page with seven variances: a favorable pig iron price reported without its label, or netted silently against scrap, hides the opposite movements the cause table depends on. Explanations that restate each variance in words earn little. Interpretive credit arrives when one cause is tied to several variances and a responsible manager is named for each.
Get a AC420 Unit 7 example written to your instructions
Standard cost cards, actual quantities and prices by input, and output for the period are what the Unit 7 problem needs from you, along with the rubric and whether mix and yield are required. Every variance is returned signed F or U, with a plausible cause beside it. Allow 24-48h; the first custom sample costs nothing.
AC420 Unit 7 questions, answered
When does a problem call for mix and yield variances?
When inputs can substitute for one another in a standard recipe, as scrap, pig iron and returns can in a charge, or as grades of labor can on a crew. If the inputs are not substitutable, a single quantity variance per input is enough. AC420 problems that give a standard mix percentage almost always expect the split.
Can a favorable price variance be bad news?
Yes, and the cause table tests for it. Cheaper material that raises defects shows up later as unfavorable yield and efficiency, so a purchasing gain can cost the plant more than it saves. Here the pig iron price was favorable for an unrelated reason, a fixed contract, and the sample says so rather than implying a link that the facts do not support.
Why is the price variance computed on actual pounds?
Because the price effect belongs to every pound actually bought and used, not to the pounds the standard allowed. Multiplying by standard quantity would push part of the price effect into the mix and yield figures and break the reconciliation. When purchases differ from usage, the sample takes price at purchase and notes why the pieces no longer sum.