The density of supply refers to the extent which retailers are concentrated in different
areas of the market under question.
Common services provided by retailers, such as alterations, free delivery, bridal
registries, check cashing, credit, short check-out lines, and gift wrapping, are not
actually the merchandise or service offered for sale.
The last step in the retail method of inventory valuation is to convert adjusted retail
book inventory to cost.
As a rule, larger retailers have higher operating costs per dollar of sales than do smaller
firms.