Please help with this question, and please please don't use other people's 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 0 01 02 03 04 05 06 07 08 09 10 11 12 0 0 0 500 500 600 600 65 Gross 0 requirements. Projected on 80 ? ? ? hand ? ? ? ? ? ? ? ? Net ? ? ? ? ? ? ? ? ? ? ? Requirements Planned ? ? order release The lead time is 2 weeks. The current on hand inventory, at the beginning of week 1 is 80 units. For a lot-for-lot scheduling policy, determine the total cost for the 12 week period when the ordering cost is $70 per order and the holding cost is $3 per unit per week. Assume that inventory cost applies if units are on hand at the beginning of the week