Austin Muffler, Inc Required:
Insert the Missing Amounts, Labelled a Through O, in Below

Austin Muffler, Inc., operates an automobile service facility. The table below shows the cost incurred during a month when 500 mufflers were replaced. $\begin{array}{l}\begin{array}{lll}\text {Number of muffler replacements}\\\\\text {Total costs}\\\text {Fixed costs}\\\text {Variable costs}\\\text {Total costs}\\\\\text {Cost per muffler replacement}\\\text {Fixed costs}\\\text {Variable costs}\\\text {Total cost per muffler replacement}\\\end{array}\begin{array}{lll}400\\\\\\A \\ \underline{B }\\ \underline{E}\\\\\\G \\\underline{J}\\\underline{M}\\\end{array}\begin{array}{lll}500\\\\\\\$ 9,000 \\ \underline{\$ 6000 }\\ \underline{\$15000}\\\\\\H \\\underline{K}\\\underline{N}\\\end{array}\begin{array}{lll}600\\\\\\C \\ \underline{D}\\\underline{F} \\\\\\I\\\underline{L}\\\underline{O} \\\end{array}\end{array}$ Required:
Insert the missing amounts, labelled A through O, in the table.