You are the manager of a small appliance store. You need to order two types of microwave ovens. The deluxe model costs you $500 and the basic model costs you $300. The profit for the deluxe model is $200 while the profit for the basic model is $50. You would like to sell a minimum of 100 microwaves and make a total profit of at least $8000. How many of each model should you order to minimize the costs?