A new firm requires an initial investment of $500 and will generate a before tax gross return of $570 after one year and then shut down. The firm is partially financed with $200 of debt at an expected return of 5%. The appropriate unlevered after-tax cost of capital is 13% and the marginal income tax rate is 21%. Evaluate the project. The approximate expected after-tax cash flow for an all-equity firm is_and the approximate APV is _ (You may wish to show your work in the comment space for "Other, specify). Approximate means within $10. a. $450, $390 b. $500, $440 C. $550, $490 d. $600, $540 e. $650, $590 f. Other, specify