Dominic Corporation has the following information about the purchase of a new piece of equipment: Cash revenues less cash expenses $380,000 per year Cost of equipment Salvage value at the end of the 10th year Increase in working capital requirements $1,200,000 $100,000 $240,000 Tax rate Life 40 percent 10 years The cost of capital is 15 percent. Required (use Excel): b. Calculate the following assuming that the company is using the seven-year MACRS half-year convention without a salvage value: i. Calculate the after-tax cash flows for each of the ten years. ii. Calculate the after-tax payback period. iii. Calculate the net present value (NPV). iv. Calculate the internal rate of return (IRR).