I’m confused about an audit procedure to the assertion of accurate valuation. Why do we compare the gross profit margin to prior years rather than comparing cost of goods sold? Because I think cost of goods sold seems to be a more direct way of examing the cost valuation of the inventory. Thanks.
You can compare gross profit to either sales (gross margin) or to cost of sales (mark-up). Once one is fixed the other is. So a markup of 25% means that the GP% must be 20
Cost Profit Selling prices 100 + 25 = 125
Markup = 25%; Gross margin = 25/125 = 20%.
So it doesn’t matter which you compare profits to. If cxlosing inventory has bee overstated (for example) both margin and gross profit woul increase.