Someone explain and show how to get answer

The gross requirements for item A are specified for the beginning of weeks 1 through 12 in the table that follows. Item A, Level O 01 02 03 04 05 06 07 08 09 10 11 12 Gross 0 6060150 50 100 0 100 0 50 0 50 requirements. Projected on 100 ? ? ? ? ? ? ? ? ? ? ? hand Planned ? ????? ?????? order release The lead time is 2 weeks. The current on hand inventory, at the beginning of week 1 is 100 units. For a "lot size using EOQ" scheduling policy, determine the total cost for the 12 week period when the ordering cost is $60 per order and the holding cost is $1 per unit per week. Answer: X The correct answer is: 949