Senocot Corporation Uses Two Different Types of Labour to Manufacture

Senocot Corporation uses two different types of labour to manufacture its product.The types of labour,Assembly and Finishing,have the following standards:
$\begin{array}{llrl}\text { Labour Type}&\text { Standard Mix }&\text { Standard Unit Price}&\text { Standard Cost}\\\text { Assembly } & 800 \text { hours } & \$ 12.00 \text { per unit } & \$ 9,600 \\\text { Finishing } & 200 \text { hours } & 8.00 \text { per unit } & \$ 1,600 \\& & &\\\text { Yield }&5000 \text { units }\end{array}$ During January,the following actual production information was provided:
$$\begin{array} { l l } \text { Labour Type } & \text { Actual Mix } \\\hline \text { Assembly } & 7,000 \text { hours } \\\text { Finishing } & 3,000 \text { hours } \\\\\text { Yield } & 45,000 \text { units }\end{array}$$ Calculate the labour efficiency and mix and yield variances.