At the year$-$end, the warehouse is completely empty. So the starting inventory is zero. The maximum capacity of the warehouse is $3500.$ Holding costs for both types is $$0\mathrm{.}05$ per unit per month. The manufacturer wants to have at least $1600$ AE $230$s and $1800$ AE $330$s in the warehouse at the beginning of May.

Production costs are $$1\mathrm{.}50$ per unit for AE$230$ and $$1\mathrm{.}80$ per unit for AE $330.$ Because demand for raw materials is rising, production costs are expected to rise by $$0\mathrm{.}10$ each month for the four months.