Problem 9-15 Determining Whether to Accept a Special Order and Whether to Make or Buy (L01 - CC4, 5) The Engine Guys produces specialized engines for "snow climber" buses. The company's normal monthly production volume is 3,000 engines, whereas its monthly production capacity is 6,000 engines. The current selling price per engine is $700. The cost per unit of manufacturing and marketing the engines at the normal volume is as follows Costs per Unit for Engines Manufacturing costs Direct materials Direct labour Variable overhead Fixed overhead 112 112 330 Subtotal Marketing costs $ 35 Variable Fixed Subtotal 112 Total unit cost $ 442