Consider the product structure of end item PR-1 given in Figure P10.1. The end-item demand from the master production schedule for the period of weeks 3, 4, 5, 6, 7,

8, 9,and 10 is 40, 30, 20, 10, 50, 30, 70, and 20 units, respectively. The manufacturing and assembly lead times for PR-1, SA-12, and C-122 and the ordering lead time for M-4 are given below. Carry out the material requirements planning procedure for raw material M-4 required to manufacture component C-122 if one unit of M-4 is required to produce one unit of C-122. Lead time for assembling PR-1 =1 week. Lead time for assembling SA-12 = 1 week.|| Lead time for manufacturing C-122 = 2 week; 100 units on-hand inventory are given and 40 units are scheduled to arrive in period 2. Procurement lead time for raw material M41 week; 40 units on-hand inventory are available.