Chown Company, Which Has Only One Product, Has Provided the Following

Chown Company, which has only one product, has provided the following data concerning its most recent month of operations:
$\begin{array}{l|r|}\hline \text { Selling price } & \$ 110 \\\hline \text { Units in beginning inventory } & 0 \\\hline \text { Units produced } & 8,000 \\\hline \text { Units sold } & 7,800 \\\hline \text { Units in ending inventory } & 200 \\\hline \text { Variable costs per unit: } & \\\hline \text { Direct materials } & \$ 22 \\\hline \text { Direct labour } & \$ 31 \\\hline \text { Variable manufacturing overhead } & \$ 3 \\\hline \text { Variable selling and administrative } & \$ 4 \\\hline \text { Fixed costs: } & \\\hline \text { Fixed manufacturing overhead } & \$ 248,000 \\\hline \text { Fixed selling and administrative } & \$ 140,400 \\\hline\end{array}$

-What was the total contribution margin for the month under the variable costing approach?

A) $142,000.
B) $179,400.
C) $390,000.
D) $421,200.