Accounts Payable had a balance of $18,320 at the beginning of the month. During the month, three debits in the amounts of $4,580, $11,180, and $14,680 were posted to Accounts Payable, and three credits in the amounts of $3,720, $9,620, and $12,820 were posted to Accounts Payable. What is the ending balance of the Accounts Payable account?

a. $14,040.

b. $22,600.

c. $4,280.

d. $48,760.