what is cost theory

2. Suppose you need to produce 100 units of product A eight weeks from now, where product A requires one unit of product B and two units of product C, while product requires one unit of product D and two units of product E. Suppose further that the lead-times for the products are as follows: Product A, four weeks, product B three weeks, product two weeks, products D and E one week each. Prepare a product structure tree and a Material Requirements Plan