Theele Corporation Has the Following Information for April, May, and June

Theele Corporation has the following information for April, May, and June:
Production costs per unit (based on 10,000 units) are as follows:
$\begin{array}{lrrr} & \text { April } & \underline{\text { May }} & \text { June } \\\text { Units produced } & 10,000 & 10,000 & 10,000 \\\text { Units sold } & 7,000 & 8,500 & 10,500\end{array}$ Theele Corporation had no beginning inventories for April, and all units were sold for $55 per unit. Costs are stable over the three months.
$\begin{array}{lr}\text { Direct materials } & \$ 13 \\\text { Direct labour } & 9 \\\text { Variable factory overhead } & 7 \\\text { Fixed factory overhead } & 5 \\\text { Variable selling and administrative expenses } & 10 \\\text { Fixed selling and administrative expenses } & 4\end{array}$
-Refer to the Figure.What is the May contribution margin for Theele Corporation when using the variable costing method?

A) $136,000
B) $170,000
C) $204,000
D) $240,000