AutoTire Inc. is your Client: Monetary Unit Sampling

You have been charged with reviewing a staff auditor's MUS and related procedures on the audit of SEC public registrant Auto Tire Incorporated of 12/31/2020. The staff auditor, Ima W. Rong, claims to have followed monetary unit sampling and performed accompanying audit procedures plan as documented below. The staff auditor's work appears - below - in a numbered list to facilitate your review and our evaluation of your review.

Following the staff auditor's work (attached), you will find a table that includes a new row for numbered item completed by the staff auditor. For each row/numbered item, you must indicate either:

"okay, leave the notes as is"; OR

Both describe and implement, to the extent practicable, any corrections needed.

That is, based on your review notes, we will be able to understand both where you think the staff auditor performed poorly and what you believe would correct the staff auditor's shortcomings (so far as you can tell from the work paper documentation provided).When providing corrections, you should show and explain your work.

This is the parameters the question is referencing:

Because we are testing one asset and one liability account, both having low risk of material misstatement, I equally weight overstatements and understatements for the overall population of monetary units of interest, which is the $5,400,000 sum of A/R and A/P.For this population, 4% is the appropriate (and average) tolerable misstatement.

Question:Given the above parameters the appropriate sample size is 57 units.

Is this okay or if not describe and implement, to the extent practicable, any corrections needed