The demand for part S is 100 units in week 7. Each unit of S requires 1 unit of T and 2 units of U. Each unit of T requires I unit of V, 2 units of W. and I unit of X. Finally each unit of U requires 2 units of Y and 3 units of Z. One firm manufactures all items. It takes 2 weeks to make S, I week to make T, 2 weeks to make U. 2 weeks to make V, 3 weeks to make W, I week to make X, 2 weeks to make Y, and 1 week to make Z. Prepare cumulative lead time product structure Using the information above construct a gross material requirements for all items in the B.O.M