The MRP gross requirements for ltem A are shown here for the next 10 weeks. Lead time for A is three weeks and setup cost is $12. There is a carrying cost of $0.015 per unit per week Beginning inventory is 80 units. WEEK 2 45 4 9 10 Gross requirements 25 Use the least total cost and the least unit cost lot-sizing methods to determine the quantity to order with the first order released with each method and which periods' requirements will be covered by that order. 4 to 8 Least total cost Least unit cost 4 to 9