A business started the month with a credit balance in the Cash at Bank account of $3,200. The following transactions occurred during the month. The business recorded revenue of $12,500 of which $5,700 is collected in cash with the balance on account. The business borrowed $3,500 from Hong Kong Bank. The business paid a cash dividend of $1,200 and interest on the account charged by the bank was $120. The closing balance of Cash at Bank account is:

a.$8 900

b.$6 000

c. $4 680

d. $1 180

e. None of the above