a. Unrecorded depreciation on the trucks at the end of the year is $40,000 b. The total amount of accrued interest expense at year-end is $6,000. c. The cost of unused office supplies still available at year-end is $2,000. a. Unrecorded depreciation on the trucks at the end of the year is $40,000 b. The total amount of accrued interest expense at year-end is $6,000. c. The cost of unused office supplies still available at year-end is $2,000