M. de Koster, of Rene Enterprises, has the master production plan shown here:

Period (weeks) 1 2 3 4 5 6 7 8 9 Gross requirements 15 20 10 25 Lead time = 1 period; setup cost = $200; holding cost = $10 per week; stockout cost = $10 per week. Your job is to develop an ordering plan and costs for:

a) Lot-for-lot.

b) EOQ.

c) POQ.

d) Which plan has the lowest cost? lop5