Please solve this problem ASAP

Each unit of A is composed of one unit of B, two units of C and one unit of D. C is composed of two units of D and three units of E. Items A, C, D and E have on-hand inventories of 20, 10, 20 and 10 units respectively. Item B has a scheduled receipt of 10 units in period 1and C has scheduled receipt of 50 units in period 1. Lot-for-lot (L4L) is used for items A and B. Item C requires a minimum lot size of 50 units. D and E are required to be purchased in multiples of 100 and 50 respectively. Lead times are 1 period for items A, B and C and 2 periods for items D and E. The gross requirement for A are 30 for period 2, 30 in period 5 and 40 in period 8. Find the planned order releases for all items. Beg. Inv. 1 2 3 4 5 6 7 8 9 10 Gross requirements Scheduled receipts Projected on hand Net requirements Planned order receipt Planned order release Beg. Inv. 1 2 3 4 4 5 5 6 7 7 8 9 10 Gross requirements Scheduled receipts Projected on hand Net requirements Planned order receipt Planned order release 677