Production of a Product Utilizes Materials D, E, and F

Production of a product utilizes materials D, E, and F. The following are their standards: $\begin{array} { l r r r } \text { Material } & \text { Standard Mix } & \text { Standard Unit Price } & \text { Standard Cost } \\ \text { D } & 6,000 \text { units } & \$ 1.00 \text { per unit } & \$ 6,000 \\ E & 4,000 \text { units } & 2.00 \text { per unit } & \$ 8,000 \\ F & 2,000 \text { units } & 1.50 \text { per unit } & \$ 3,000 \end{array}$
Yield 8,000 units
During August, the following actual production in formation was provided:
$\begin{array} { l r } \text { Material } & \text { Actual Mix } \\ D & 37,000 \text { units } \\ E & 17,000 \text { units } \\ F & 7,000 \text { units } \end{array}$
Yield 50,000 units
Required:
Calculate the materials mix, yield, and usage variances.