Problem 07.037 - MIRR calculation For the net cash flow series, find the external rate of return (EROR) using the MIRR method with an investment rate of 18% per year and a borrowing rate of 9% per year. Year 3 4 5 6 Net Cash Flow, $ 7.000 -3.000 -7.000 4.000 -2,300 2,600 The external rate of return Is %