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.

Question: The overall sampling interval is $94,737.However, to add some "randomness" to the sampling plan, I oversample the A/P monetary units as compared to the A/R monetary units.Specifically, I will use a sampling interval of one-half of he overall interval for A/P ($94,737/2 = $47,368).At the same time, I double the sample interval for A/R to $189,474. Thus I will sample 13 monetary units from A/R and 44 from A/P, for a total of 57.(13+44 = 57).

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