1. Which of the following statements about the ABC inventory classification system is TRUE?

a. This approach is based on an insight established by Adam Smith in The Wealth of Nations. b. A items represent 50 to 60 percent of all the items in inventory and account for 5 to 15 percent of the companys inventory investment.

c. This approach is utilized because not all of the items in a companys inventory are equal and so may require differing levels of control.

d. To establish the classification of items into their groups, the items are first ranked from highest dollar per unit value to lowest