On a material requirement plan tree . The tree consists of P

A(2) B(3)

D(4) D C(2)

F(2) F(2)

On a material requirements plan for item P and components the lead times are one week and lot for for ordering is used except for item F which is ordered in multiples of 400. One hundreds units of P should be available at the start of week 4 and at the start of week 8. Beginning inventories are: 20 P, 100 A, and 200 F. Scheduled receipts are 800 F at the start of week 1