A company produces products A, B, C, and D, each of which can be sold at an intermediate phase of production or can be processed further to make a more refined product. Information about the company's products follows: Product A B C D Costs incurred to get product to intermediate stage $160,000 $235,000 $110,000 $38,000 Sales value at intermediate stage $100,000 $210,000 $115,000 $39,000 Additional processing costs $25,000 $40,000 $10,000 $11,000 Sales value at completion $180,000 $255,000 $130,000 $49,000 In order to maximize profitability, how many of the products should be processed further (rather than ran sold at the intermediate stage)?