Healthier Cook Company Manufactures Two Products: Toaster Ovens and Bread

Healthier Cook Company manufactures two products: toaster ovens and bread machines. The following data are available: $$\begin{array} { | l | r | r | } \hline & \text { Toaster Ovens } & \text { Bread Machines } \\\hline \text { Sale price } & \$ 80 & \$ 150 \\\hline \text { Variable costs } & \$ 40 & \$ 70 \\\hline\end{array}$$ Healthier Cook can manufacture six toaster ovens per machine hour and four bread machines per machine hour. Healthier Cook's production capacity is 1,800 machine hours per month.
- What is the contribution margin per machine hour for bread machines?

A) $20
B) $240
C) $320
D) $7