Oriole, Inc. is considering purchasing equipment costing $68000 with a 6-year useful life. The equipment will provide annual cost savings of $16541 and will be depreciated straight-line over its useful life with no salvage value. Oriole 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 internal rate of return for this investment? 9% 10% 11% 12%