Phoenix Company's $2019$ master budget included the following fixed budget report. It is based on an expected production and sales volume of $15,000$ units.

$3.$ The company's business conditions are improving. One possible result is a sales volume of $18,000$ units. The company president is confident that this volume is within the relevant range of existing capacity. How much would operating income increase over the budgeted amount of $$369,000$ if this level is reached without increasing capacity?

Answer is not complete.

$\backslash$table$[[$PHOENIX COMPANY$],[$Forecasted Contribution Margin Income Statement$],[$For Year Ended December $31,2019],[$Sales $($in units$),,15,000,18,000,,],[\backslash$table$[[$Contribution margin $($per$],[$unit$)]],$$$,128\mathrm{.}00,$$$,128\mathrm{.}00,,],[$Contribution margin$],[$Fixed costs$],[$Operating income,$$,753,000,$$$369,000,$$$384,000,$Operating income increase$]]$