Paid $42,000 cash to replace a motor on equipment that extends its useful life by four years. Paid $210 cash per truck for the cost of their annual tune-ups. Paid $168 for the monthly cost of replacement filters on an air-conditioning system. Completed an addition to a building for $236,250 cash. 1. Classify the above transactions as either a revenue expenditure or a capital expenditure. 2. Prepare the journal entries to record the four transactions from part