Please show all work and formulas used please

Aggregate demand for a product family is given in the table below for the 4 quarters of 2007. Production cost on regular time is $3 per unit. The inventory cost is $1 per unit per quarter. Demand that cannot be met is a lost sale and accounted for at $9 per unit. When necessary, up to 100 units can be subcontracted at a cost of $5 per unit. Labor fluctuation costs are accounted for by costs of changes in production level: each unit of increase in production is accounted for at $1 per unit of increase and $2 per unit of decrease. The aggregate planning technique being considered is level production. That is, the production level is the same for each quarter. Compute the total annual cost of meeting demand for 2007. (Determine the number of units to produce in each month. Then for each month, compute the number of units to be subcontracted, the inventory, and the lost sales). Lost Quarter Demand Production Inventory Sale 200 0 Win 07 800 ? ? ? Spr07 300 ? ? ? Sum07 500 ? ? ? Fal07 400