Economic Order Quantity. Luster Corporation presents the following data: Usage is 400 units per month, cost per order is $20, and carrying cost per unit is $6. Given these data, answer the following...

Economic Order Quantity. Luster Corporation presents the following data: Usage is 400 units per month, cost per order is $20, and carrying cost per unit is $6.

Given these data, answer the following questions: (a) What is the economic order quantity?

(b) How many orders are required each month? (c) How often should each order be placed?