Give me some detail, not just answer. How to calculate the results

149. Wells Company's delivery truck, which originally cost $70,000, was destroyed by fire. At the time of the fire, the balance of the Accumulated Depreciation account amounted to $47,500. The company received $40,000 reimbursement from its insurance company. The gain or loss as a result of the fire was a. $30,000 loss. b. $17,500 loss. c. $30,000 gain. d. $17,500 gain. 150. A truck that cost $21,000 and on which $10,000 of accumulated depreciation has been recorded was disposed of for $9,000 cash. The entry to record this event would include a a. gain of $2,000. b. loss of $2,000. c. credit to the Truck account for $11,000. d. credit to Accumulated Depreciation for $10,000. 151. A truck that cost $36,000 and on which $30,000 of accumulated depreciation has been recorded was disposed of for $9,000 cash. The entry to record this event would include a a. gain of $3,000. b. loss of $3,000. c. credit to the Truck account for $6,000. d. credit to Accumulated Depreciation for $30,000. 52. Ace Corporation sold equipment for $12,000. The equipment had an original cost of $36,000 and accumulated depreciation of $18,000. As a result of the sale, a. net income will increase $12,000. b. net income will increase $6,000. c. net income will decrease $6,000. d. net income will decrease $12,000. 153. Jarman