Given the following data:

Period 1 2 3 4 5 6 7 8 9

Gross Requirements 70 30 90 30 80 20 90 60 80

The beginning inventory is 0 and there are no scheduled receipts. The order cost is $90 and the holding cost is $1 per part per period.

What are the order costs, carrying costs, and totals cost over the 9 periods using the lot-for-lot size rule?

What are the order costs, carrying costs, and totals cost over the 9 periods using the fixed order quantity rule with FOQ = 100?

What are the order costs, carrying costs, and totals cost over the 9 periods using the period order quantity rule with POQ = 3?