Dominus Inc, uses account analysis to estimate costs and had estimated the following costs as cost that are driven by labor hours Fixed costs variable costs Account 1 1,347 3,190 Account 2 323 2,503 Account 3 453 1,308 Account 4 1,630 405 These costs are associated with a 380 labor hours Determine the linear cost equation and estimate what total costs would be if the company uses 489 labor hours