Complete Each of the Following Contribution Format Income Statements by Supplying

Complete each of the following contribution format income statements by supplying the missing numbers.
$$\begin{array}{lccc}& \textbf { Blue Co. } & \textbf {Red, Inc. } \\\\\text {Sales revenue} & ? & \$60,000 \\\text {Variable costs} & \underline{9,000} & \underline{\quad\quad?\quad\quad} \\\text {Contribution margin} & ? & 40,000 \\\text {Fixed costs }& \underline{12,000} & \underline{\quad\quad?\quad\quad} \\\text {Operating income} & ? & ? \\\text {Income taxes} & \underline{1,600} & \underline{4,000} \\\text {Net income} & \underline{\underline{\$4,800}} & \underline{\underline{\$16,000}} \\\end{array}$$