Presented Below Is the Production Data for the First Six

Presented below is the production data for the first six months of the year showing the mixed costs incurred by Brooklyn Company. $$\begin{array} { l l r } \text { Month } & \text { Cost } & \text { Units } \\\text { July } & \$ 7,500 & 4,000 \\\text { August } & 11,250 & 9,500 \\\text { September } & 11,500 & 9,000 \\\text { October } & 11,700 & 10,500 \\\text { November } & 13,500 & 12,000 \\\text { December } & 12,850 & 10,000\end{array}$$ Brooklyn Company uses the high?low method to analyze mixed costs.The total cost at an operating level of 10,000 units is _____.

A) $12,500
B) $12,000
C) $11,800
D) $11,725