Jon Johnson, an accountant with a local CPA firm, has just completed an inventory count for Mom & Pop's Groceries. Mom and Pop provide audited financial statements to their bank annually, and part of that audit requires an inventory count. Don Squire, a partner with the CPA firm, has also conducted an analysis to estimate this periods ending inventory. Don used the gross margin method, a method whereby the prior period's gross margin percentage is used to infer this period's percentage, to estimate ending inventory. In addition, the store is equipped with cash registers that scan each product as it is sold and, as a result, provide a perpetual inventory record.
These three inventory analysis methods have resulted in three very different answers, which are summarized in the following table:
Method Inventory Value
Inventory count ........................................................... $ 98,500
Gross margin analysis ................................................... 119,750
Point-of-sale scanners ................................................... 111,500
In evaluating the results, Jon and Don are curious as to why the three methods result in such large differences. Since the inventory count reports actual inventory on hand, they begin to wonder if Mom and Pop have an inventory theft problem. Write a short memo explaining why the other two methods, gross margin analysis and point-of-sale scanners, can result in significantly different answers without there being a theft problem.