On January $1,2024,$ Canseco Plumbing Fixtures purchased equipment for $$66,000.$ Residual value at the end of an estimated four$-$year service life is expected to be $$6,000.$ The company expects the equipment to operate for $15,000$ hours. The equipment operated for $4,000$ and $4,800$ hours in $2024$ and $2025,$ respectively.

Required:

Calculate depreciation expense for $2024$ and $2025$ using straight$-$line method.

Calculate depreciation expense for $2024$ and $2025$ using double$-$declining$-$balance method.

Calculate depreciation expense for $2024$ and $2025$ using units$-$of$-$production using hours operated.