39. On March 31, 2015, Cars, Inc. owes Preston Devices, one of its suppliers, $25,000 for previous purchases. During April 2015, Preston sells Cars devices with a sales price of $10,000 and a cost to Preston of $8,000. During April, Cars pays Preston $12,000 against the amount owed to Preston. What is the effect of these April transactions on Preston's balance sheet? Cash increased by $12,000; accounts receivable decreased by $2,000; inventory decreased by $8,000; retained earnings increased by