Net present value method—annuity jones excavation company is planning an investment of $125,000 for a bulldozer. the bulldozer is expected to operate for 1,000 hours per year for five years. customers will be charged $90 per hour for bulldozer work. the bulldozer operator costs $30 per hour in wages and benefits. the bulldozer is expected to require annual maintenance costing $7,500. the bulldozer uses fuel that is expected to cost $15 per hour of bulldozer operation.