i have trouble with partial payments, what is the adjusted balance after the second payment?

Jones of Boston borrowed $40,000, on a 90 day 10% note. After 60 days, Jones made an initial payment of $6,000. On day 80, Jones made an additional payment of $7,000. Assuming the U.S. Rule, what is the adjusted balance after the second payment? Use 360 days. Adjusted balance