Benjamin Company Had the Following Results of Operations for the Past

Benjamin Company had the following results of operations for the past year: $$\begin{array} { | l | r | r | } \hline \text { Sales } ( 16,000 \text { units at } \$ 10 ) & & \$ 160,000 \\\hline \text { Direct materials and direct labor } & \$ 96,000 & \\\hline \text { Overhead ( } 20 \% \text { variable) } & 16,000 & \\\hline \text { Selling and administrative expenses (all fixed) } & \underline { 32,000 } & \underline { ( 144,000 ) } \\\hline \text { Operating income } & & \underline { \$ 16,000 }\\\hline\end{array}$$ A foreign company (whose sales will not affect Benjamin's market) offers to buy 4,000 units at $7.50 per unit. In addition to variable manufacturing costs, selling these units would increase fixed overhead by $600 and selling and administrative costs by $300. Assuming Benjamin's productive capacity is 16,000 units per year and accepts the offer, its profits will:

A) Decrease by $10,000.
B) Decrease by $10,900.
C) Decrease by $ 6,000.
D) Increase by $ 9,100.
E) Increase by $ 4,300.