$2\mathrm{.}6$ A track dozer cost $$1,650,000$ to purchase. Fuel, oil, grease, and minor maintenance are estimated to cost $$35\mathrm{.}00$ per operating hour. A major engine repair costing $$46,000$ will probably be required after $7,200$ hours of use. The expected resale price $($salvage value$)$ is $21\%$ of the original purchase price. The machine is expected to have a useful life of $10,800$ hours. How much should the owner of the machine charge per hour of use, if it is expected a machine will operate $1,800$ hours per year? The company's cost$-$of$-$capital rate is $5\mathrm{.}3\%.$