Consider the following two tractors a company can purchase. The following tables provide the costs the company will incur $($in thousands of dollars$)$ in the lifetime of each tractor.

Initial Cost Operating Costs per Year Expected Life

Diesel $$18,000$ $$5,0006$

Gasoline $$6,000$ $$10,0004$

The transportation firm can only afford one of the tractors. The two tractors have identical production capabilities. The firm's cost of capital is $1\%.$

Find the present value of the costs of using the two tractors.

Diesel $=$

Gasoline $=$