3- At January 1, 2012, Alfa Company's accounts receivable balance was $3,600. During January, Alfa performed a credit service worth $14,400 and collected accounts receivable of $12,000. At January 31, 2012, the accounts receivable balance is O $1,200 debit. $ $6,000 debit. O $1,200 credit. O $ $6,000 credit. O None of the above