A3+ Has Prepared Its 3rd Quarter Budget and Provided the Following

A3+ has prepared its 3rd quarter budget and provided the following data: $$\begin{array} { | l | r | r | r | } \hline & { \text { Jul } } & { \text { Aug } } & { \text { Sep } } \\\hline \text { Cash collections } & \$ 50,000 & \$ 40,000 & \$ 48,000 \\\hline \text { Cash payments: } & & & \\\hline \text { Purchases of inventory } & 31,000 & 22,000 & 18,000 \\\hline \text { Operating expenses } & 12,000 & 9,000 & 11,600 \\\hline \text { Capital expenditures } & 13,000 & 25,000 & 0 \\\hline\end{array}$$
-Refer to the table above,The cash balance on June 30 is projected to be $4,000. The company has to maintain a minimum cash balance of $5,000 and is authorized to borrow at the end of each month to make up any shortfalls. It may borrow in increments of $5,000 and has to pay interest every month at an annual rate of 5%. All financing transactions are assumed to take place at the end of the month. The loan balance should be repaid in increments of $5,000 whenever there is surplus cash. Calculate the amount of principal repayment at the end of September.

A) $5,000
B) $10,000
C) $15,000
D) $20,000