Ewing Corporation's Controller Has Developed the Cost and Usage Data

Ewing Corporation's controller has developed the cost and usage data listed below in preparation of standard unit cost information for the coming year. $\begin{array}{lr} \text { Direct materials quantity standard } & 3 \text { pounds per product } \\\text { Direct labor time standard } & 5 \text { hours per product } \\\text { Direct materials price standard } & \$ 10 \text { per pound } \\\text { Direct labor rate standard } & \$ 9 \text { per hour } \\\text { Standard variable overhead rate } & \$ 5 \text { per labor hour } \\\text { Standard fixed overhead rate } & \$ 10 \text { per labor hour }\end{array}$
The standard unit cost for direct materials is

A) $30.
B) $10.
C) $50.
D) $27.