15 The MRP gross requirements for Item X are shown here for the next 10 weeks. Lead time for A is two weeks, and setup cost is $9. There is a carrying cost of $0.02 per unit per week. Beginning inventory is 70 units.

Use the least total cost or the least unit cost lot-sizing method to determine when and for what quantity the first order should be released.

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WEEK 1 2 3 4 5 6 7 8 9 10 Gross requirements 20 10 15 45 10 30 100 20 40 150