Answer:
The correct answer is a. When it can reasonably estimate the amount of returns
Explanation:
The percentage of merchandise returned in a given period can be calculated by simply dividing the number of items returned by the number that has been sold. However, if you want to calculate the return percentage on a dollar basis, you must take into account additional factors, such as the penalties charged to customers for the return of merchandise, as well as the costs associated with re-storing returned items.