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 25% per year and a borrowing rate of 12% per year. Year 1 2 3 4 | | Net Cash Flow, $ 1 10,000 -9,000 -6,000 5,000T | 5 -800T 2 6 ,300 The external rate of return is