Kindly explain to me how the (a) is the correct answer

Question: Calculating Minimum Cost Reductions Jasper Company has a payback goal of three years on new equipment acquisitions. A new sorter is being evaluated that costs $450,000 and has a five-year life. Straight-line depreciation will be used; no salvage is anticipated. Jasper is subject to a 40% income tax rate. To meet the company's payback goal, the sorter must generate reductions in equal annual cash operating costs of at least: a. $190,000. b. $114,000. c. $150,000 d. $60,000