Question 4 5 pts Suppose that one of Willcom's sellers sells two types of projects with pricing as follows: Projector X costs: $16 per unit if the order quantity is less than 125; $15 per unit if the quantity is at least 125 but less than 300; $14.5 per unit if the quantity is at least 300 but less than 450; $14 per unit if the order quantity is at least 450. Project Y costs $16 per unit. Suppose placing an order costs the buyer $50 in processing costs. Holding cost is based on 30% annual rate. Annual demand for projector X is 600 and for projector Y is 250. What is the minimum annual total cost (ordering, holding and purchasing) if the buyer places independent orders for the two products? What is the minimum annual total cost (ordering, holding and purchasing) if the buyer places orders for the two products at the same time