Answer:
Date Account and Explanation Debit$ Credit$
Jan 1 Accumulated depreciation-Machine 63000
Machine 6300
June 30 Depreciation expense (37000/4)*6/12 4625
Accumulated depreciation-Computer 4625
(To record Dep)
June 30 Cash 6000
Accumulated depreciation-Computer 23125
(37000/4*2.5)
Loss on sale of computer 7875
Computer 37000
(To record sale of computer)
Dec 31 Depreciation expense (24500-3400/5) 4220
Accumulated depreciation-Delivery truck 4220
(To record Dep)
Dec 31 Cash 9130
Accumulated depreciation-Truck 16880
(24500-3400/5*4)
Gain on sale of delivery truck 1510
Delivery truck 24500
(To record sale of computer)