Prentice Hall wants to reduce a large stock of Quantitative Analysis books from their warehouse. They have offered

the JU Bookstore a quantity discount pricing schedule, as follows:

Assuming the annual demand rate is $400$ books, the ordering cost is $$20,$ and the annual holding

cost is $$3$ per textbook, answer the following:

$7$a$)$ What should your order size be if you want to minimize total cost?

$7$b$)$ What is the minimum TOTAL ANNUAL COST?