i hope the anwsers are clear and in order

E & T Excavation Company is planning an investment of $540, 600 for a bulldozer. The bulldozer is expected to operate for 2,000 hours per year for seven years. Customers will be charged $145 per hour for bulldozer work. The bulldozer operator costs $31 per hour in wages and benefits. The bulldozer is expected to retire annual maintenance costing $20,000. The bulldozer uses fuel that is expected to cost $41 per hour of bulldozer operation. a. Determine the equal annual net cash flows from operating the bulldozer. Enter all amounts as positive numbers. b. Determine the net present value of the investment, assuming that the desired rate of return is 12%. Use the table of present value of an maturity of $1 above. If required, round to the nearest dollar and use the minus sign to indicate a negative net present value