4. (Total 25 points) It is given that K and L are the immediate upper level items for P in the product structure (BOM) and each unit of K needs 5 units of P and each unit of L needs 6 units of P. P is not required by any other items in the product structure. Given the following planned order release (PRL) for K and L, obtain the gross requirements (GR) for P and then obtain PRL for P in the MRP table if P has a scheduled receipt of 200 in period 2 and 150 in period 5, and on-hand inventory of 800 units. The lead times for K, L, and P are 2, 1, and 1 periods respectively.

Periods

1 2 3 4 5 6 7

K: LT= PRL 180 90 110 90 100

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L: LT= PRL 95 115 100 80

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P: LT= GR_________________________________________________________

SR_________________________________________________________

OH_________________________________________________________

NR_________________________________________________________

POR________________________________________________________

PRL

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7 points for obtaining GR of P in different periods

18 points for obtaining the rest of the values in the table for P in different periods.