coldpoint is a home appliance manufacturer. the company purchases a certain component for their products. southern electronics and electrotech are two companies that make the component, and their products and services are equal, so the component will be bought based solely on cost. both companies offer a discount policy based on order quantity. however, these two companies post different price schedules. for southern electronics, if the order quantity is less than 500 units, the price is $0.60 per unit; if the quantity is 500 or more but less than 1000, the unit price is $0.58; any quantity 1000 units or over has a unit price of $0.56. electrotech offers the same quantity range and prices. however, the discount rare applies only to the excess amount ordered. that is, if the order quantity is 500 units, the first 499 units cost $0.60 and the 500th unit cost $0.58. if 1000 units are ordered, the first 499 units cost $0.60 and the next 500 [500, 999] cost $0.58. any unit beyond the 1000th costs $0.56. the company estimates the cost of placing an order to be $20, and the uniform annual demand for this subcomponent is 800 units. inventory carrying cost is estimated to be 20 percent annually. a) plot the cost curve for southern electronics b) compute the minimum cost order quantity for southern electronics. c) plot the cost curve for electro tech d) compute the minimum cost order quantity for electro tech