When is the relative sales value method used to allocate costs to inventory?

Select one:

a. When the relative sales value method is more economical than determining the cost of each inventory item.

b. When the sales value of the inventory is a good indicator of the economic utility of the inventory item.

c. When at least two different types of inventory items are purchased for one lump sum price.

d. Both A and B.

e. Both B and C.

f. Both A and C.