- Depreciation must be recorded through double-entry bookkeeping, with a separate provision for depreciation account for each depreciated asset. - Brian Blackpool calculates depreciation on two motor vehicles using the reducing balance method at 20% annually. He sells the first vehicle in 2007. - To account for the disposal, the motor vehicle account is debited to transfer the original cost to the disposals account, the provision for depreciation account is debited to transfer accumulated depreciation, and the disposals account is credited with the sale proceeds.