In an MRP problem, A is an MPS item. Every A requires 3 B's and 2 C's. Every B requires 5 C's. All lead times are one period.
Initial inventory values for all items are 0. Use lot-4-lot method for order quantities for all items.
a) If gross requirement for A is 800 in period 9, what will be the planned order release for B in period 5?
b) If gross requirement for A is 400 in period 10, what will be the planned order release for C in period 8?