please explain how to do this

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 sell one type of carburetor to Troy Engines, Ltd., for a cost of $20 per unit. To evaluate this offer, Troy Engines, Ltd., has gathered the following information relating to its own cost of producing the carburetor internally 15,600 Per Units Unit Per Year Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead, $ 5 $ 78,000 7 109,200 3 46,800 6 93,600 traceable Fixed manufacturing overhead, 9 140,400 allocated Total cost S$468,000 "40% supervisory salaries: 60% depreciation of special equipment (no resale value). Required 1a.Assuming that the company has no alternative use for the facilities that are now being used to produce the carburetors, compute the total cost of making and buying the parts. (Round your Fixed manufacturing overhead per unit rate to 2 decimals.) Make Total relevant cost 15,600 units 1b.Should the outside supplier's offer be accepted? Accept Reject 2a.Suppose that if the carburetors were purchased, Troy Engines, Ltd., could use the freed capacity to launch a new product. The segment margin of the new product would be $52,560 per year. Compute the total cost of making and buying the parts. (Round your Fixed manufacturing overhead per unit rate to 2 decimals.) Make Bu Total relevant cost (15,600 units 2b.Should Troy Engines, Ltd., accept the offer to buy the carburetors for $20 per unit? Reject Accept