Tower Company owned a service truck that was purchased at the beginning of Year 1 for $35,000. It had an estimated life of three years and an estimated salvage value of $2,000. Tower Company uses straight-line depreciation. In Year 3, Tower Company spent the following amounts on the truck: January 4 Overhauled the engine for $6,400. The estimated life was extended one additional year, and the salvage value was revised to $1,000. July 6 Obtained oil change and transmission service, $290. August 7 Replaced the fan belt and battery, $390. December 31 Purchased gasoline for the year, $7,900. December 31 Recognized Year 3 depreciation expense.