Nelson, Inc., had a piece of equipment that cost $66,000 and had accumulated depreciation of $50,000. Read the requirement. a. Nelson discarded the equipment receiving \$0. (Record debits first, then credits. Exclude explanations fro entries.) b. Nelson sold the equipment for $18,500 cash. c. Nelson traded the equipment in on a new piece of equipment costing $70,000. Nelson was granted a $17,50 trade-in allowance for the old equipment and paid the difference in cash. d. Nelson traded the equipment in on a new piece of equipment costing $61,000. Nelson was granted a $13,000 trade-in allowance for the old equipment and signed a note payable for the difference