Using the following transactions, calculate: (i) the ending balance of Cash, (ii) the ending balance of Accounts Receivable Indicate whether each balance is debit or credit. a. Opened business by investing $20,000 in cash. b. Billed customers for services rendered, $4,000. c. Paid for six months' subscription in advance, $1,000. d. Received advertising bill, to be paid next week, $200. e. Withdrawals of $1,600 were made by the