A Paint Company Has the Following Aggregate Demand Requirements and Cost

A paint company has the following aggregate demand requirements and cost data for the upcoming year by quarter.
$$\begin{array} { c c } \text { Quarter } & \text { Forecast Demand units) } \\\hline 1 & 1,200 \\2 & 1,500 \\3 & 1,900 \\4 & \underline { 1,000 } \\\text{Total}&5,600\end{array}$$ $$\begin{array} { l c } \begin{array} { l } \text { Previous quarter's producton: } \\\text { Bepinging inventory: } \\\text { Backorder costs: }\end{array} & \begin{array} { l } \text { 900 units } \\\text { 0units } \\\$ 60 / \text { unit }\end{array} \\ \text { Iventory holding cost } & \\\begin{array} { l } \text { on ending inventory): } \\\text { Hiring employees: } \\\text { Firing employees: }\end{array} & \begin{array} { l } \text { \$12/unit/quarter } \\\$ 30 \text { unit increase } \\\$ 70 \text { unit decrease }\end{array} \\\end{array}$$
a. Determine the change in workforce costs hiring and firing (employees) if the paint company decides to use a chase demand strategy.
b. Determine the inventory holding and backorder costs for the year if the paint company wants to use a level production strategy, ending Quarter 4 with no inventory.