For fiscal year 2018, Katherine's store had net income of $6,000,000. interest expense was $2,250,000 & the company tax rate on income was 40%. Total assets were $80,000,000 & non-interestbearing current liabilities were $6,700,000. The company's cost of capital (required rate of return) is 10 %.

Calculate NOPAT, invested capital, and residual income for Katherine's store and comment on her company's profitability.

Please show all work so I will understand how to do a similar problem.