The Following Information About the Two Motorcycle Models Produced by Custom

The following information about the two motorcycle models produced by Custom Choppers, Inc. is given: $$\begin{array} { | l | r | r | } \hline & \text { Budgeted } & \text { Actual } \\\hline \text { Standard model sales in units } & 300 & 500 \\\hline \text { Customized model sales in units } & 100 & 150 \\\hline \text { Standard model budgeted contribution margin } & \$ 3,500 & \\\hline \text { Customized model budgeted contribution margin } & \$ 6,500 & \\\hline \text { Budgeted average unit contribution margin } & \$ 4,250 & \\\hline \text { Total contribution margin } & \$ 1,700,000 & \$ 3,525,000 \\\hline\end{array}$$
Calculate the sales mix variance.