Need help calculating cash payback period and annual rate of return. Please provide the calculations so I can learn how to do this. Thank you in advance!

Brady Service Center just purchased an automobile hoist for $32,940. The hoist has an 8-year life and an estimated salvage value of $3,040. Installation costs and freight char The new hoist will be used to replace mufflers and tires on automobiles. Brady estimates that the new hoist will enable his mechanics to replace 6 extra mufflers per week. Eac Compute the cash payback period for the new hoist. (Round answer to 2 decimal places, e.g. 10.50.) Cash payback period ? Years Compute the annual rate of return for the new hoist. (Round answer to 1 decimal place, e.g. 10.5.) Annual rate of return Please show work ? % reight charges were $3,751 and $840, respectively. Brady uses straight-line depreciation. r week. Each muffler sells for $74 installed. The cost of a muffler is $40, and the labor cost to install a muffler is $13