For each transaction, identify a possible source document. a. The business received $20,000 cash and gave capital to the owner. b. Purchased office supplies on account, $500. c. Recorded $1,000 revenue for services rendered to customers. The business received $20,000 cash and gave capital to the a. owner. b. Purchased office supplies on account, $500. c. Recorded $1,000 revenue for services rendered to customers