20- At the end of the month May, the accounts payable ledger shows ending balance of: * Credit balance $31,500 Credit balance $18,000 Debit balance $31,500 Debit balance $36,000 O Credit balance $13,500 Beta Company performed the following transactions during the month of May. May 1 Invested $108,000 cash in the business. May 11 Purchased building costing $36,000 on account from Sam Automotive. May 14 Paid advertising bill, $4,500. May 17 Performed services on account totaling $6,300. May 19 Received $9,900 cash in advance from Adam Company for services expected to be completed by the end of July. May 21 Purchased a machine for $10,800 cash. May 25 Paid salaries of $13,500. May 26 Paid half of balance due to Sam Automotive. May 28 Received $4,500 cash from customer billed in Jan 17. May 30 Purchased equipment costing $13,500 by signing a note to the supplier