Cheyenne, Inc. is considering purchasing equipment costing $66000 with a 6-year useful life. The equipment will provide annual cost savings of $18000 and will be depreciated straight-line over its useful life with no salvage value. Cheyenne requires a 10% rate of return. Present Value of an Annuity of 1 Period 8% 9% 10% 11% 12% 15% 6 4.623 4.486 4.355 4.231 4.111 3.784. What is the approximate net present value of this investment? $42000 $12390 $10157 $14748 13