ABC Company had a beginning balance of $6,200 in its Accounts Receivable account. The ending balance of Accounts Receivable was $6,300. ABC's Salaries Payable account has a beginning balance of $1,400 and an ending balance of $3,400. During the period, ABC recognized $40,000 of revenue on account and $21,000 of accrued salaries expense. How much accrued salaries did ABC pay during the period? $25,800 $19.000 $21.000 $23,000