Assuming a Zero Cash Balance at the Start of January

Assuming a zero cash balance at the start of January, the cash balance at the end of March is. _____________
$$\begin{array}{l}\begin{array} { l r l } &\text { Sportif, Inc. }\\\text { Month } &{ \text { Sales } } & \text { Disbursements } \\\text { January } & \$ 5,000 & \$ 6,000 \\\text { February } & 6,000 & \$ 7,000 \\\text { March } & 10,000 & \$ 4,000 \\\text { April } & 10,000 & \$ 5,000 \\\text { May } & 10,000 & \$ 5,000\end{array}\end{array}$$

A) $250
B) $2,500
C) $500
D) $4,000