Kleener Co. acquired a new delivery truck at the beginning of its current fiscal year. The truck cost $78,000 and has an estimated useful life of four years and an estimated salvage value of $12,000.

a-1. Calculate depreciation expense for each year of the truck's life using Straight-line depreciation. FIll in yellow box

a-2. Calculate depreciation expense for each year of the truck's life using Double-declining-balance depreciation. Fill in yellow boxes.

b. Calculate the truck's net book value at the end of its third year of use under each depreciation method.

Depreciation expense per year