Speedy Taxi Service uses the units-of-production method in calculating depreciation on its taxicabs. Each cab is expected to be driven 550,000 km. Taxi 10 cost $38,950 and is expected to have a residual value of $4,300. Taxi 10 is driven 90,000 km in 2023 and 135,000 km in 2024. Calculate 

(a) The depreciable amount per kilometer (use three decimals).

(b) The depreciation expense for 20.