Consider the Estimated Aggregate Demand for a Company's Ski Product

Consider the estimated aggregate demand for a company's ski product line for the upcoming year in the following table.Calculate the planned monthly production level using level production strategy.
$$\begin{array} { | c | c | c | c | } \hline \text { Month } & \begin{array} { c } \text { Demand } \\\text { (in pairs } \\\text { of unit) }\end{array} & \text { Month } & \begin{array} { c } \text { Demand } \\\text { (in pairs } \\\text { of units) }\end{array} \\\hline \text { Jan } & 8,000 & \text { J uly } & 1,000 \\\hline \text { Feb } & 7,000 & \text { Aug } & 1,300 \\\hline \text { Mar } & 6,000 & \text { Sept } & 1,000 \\\hline \text { Apr } & 4,000 & \text { Oct } & 3,000 \\\hline \text { May } & 2,000 & \text { Nov } & 5,700 \\\hline \text { J une } & 2,000 & \text { Dec } & 7,000 \\\hline\end{array}$$

A) 4,000
B) 5,000
C) 4,500
D) 5,500