O'Reilly,Inc The Cash Balance on June 30 Is Projected to Be

O'Reilly,Inc.has prepared its third quarter budget and provided the following data: $$\begin{array} { | l | r | r | r | } \hline &{ \text { Jul } } & { \text { Aug } } & { \text { Sep } } \\\hline \text { Cash collections } & \$ 51,000 & \$ 39,700 & \$ 47,900 \\\hline \text { Cash payments: } & & & \\\hline \text { Purchases of direct materials } & 30,000 & 21,900 & 17,000 \\\hline \text { Operating expenses } & 12,200 & 8,100 & 11,300 \\\hline \text { Capital expenditures } & 13,400 & 24,700 & 0 \\\hline\end{array}$$ The cash balance on June 30 is projected to be $4,500.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 4%.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