Problem 9-4 Determining Whether to Make or Buy (LO1 - CC4) Troy Engines Ltd. manufactures a variety of engines for use in heavy equipment. The company has always produced all of the necessary parts for its engines, including all of the carburetors. An outside supplier has offered to produce and sell one type of carburetor to Troy Engines Ltd. for a cost of $62.5 per unit. To evaluate this offer, Troy Engines Ltd. has gathered the following information relating to its own cost of producing the carburetor internally: Direct materials Direct labour Variable manufacturing overhead Fixed manufacturing overhead, traceable Fixed manufacturing overhead, allocated Per 25,500 Units Unit per Year $ 17 $ 433,500 17 433,500 10 255,000 420,750 16 408,000 Total cost $76.5 $1,950,750 * One-third supervisory salaries; two-thirds depreciation of special equipment (no resale value). Required: 1-a. Compute the total differential cost per unit for producing and buying the product. (Round your answers to 1 decimal places.) Make Buy Total differential cost (per unit)