Current Attempt in Progress Windsor, Inc. is considering purchasing equipment costing $42000 with a 6-year useful life. The equipment will provide annual cost savings of $10216 and will be depreciated straight-line over its useful life with no salvage value. Windsor requires a 10% rate of return. Present Value of an Annuity of 1 Period 8% 9% 10% 11% 12% 15% 4.623 4486 4.355 4.231 4.111 3.784 What is the approximate internal rate of return for this investment? 10% 12% 0.9% 11%