Write an equation for the cost function based on the regression analysis?

The new cost analyst in your accounting department just received a computer-generated report that contains the results of a simple regression analysis. He was estimating the costs of the marketing department, using units sold as the cost driver. The summary results of the report are as follows:

Variable		Coefficient		t-statistic		p-value
Intercept		12.44		1.39		0.25
Units sold		222.35		2.48		0.001
Adjusted R-square = 0.61

Write an equation for the cost function based on the regression analysis. (Round entry to 2 decimal places, e.g. 15.25.)

(please help solve this here) Cost formula: Total Cost = $_______________ x units sold