The Tallebudgera Tea Rooms Has a Foyer Shop That Sells $$\begin{array} { | l | c | c | } \hline & \text { August } & \text { September } \\\hline \text { T-shirt sales } & 600 & 500 \\\hline\end{array}$$

The Tallebudgera Tea Rooms has a foyer shop that sells souvenir T-shirts. The shop manager likes to hold 20% of the following month's projected T-shirt sales in stock. Projected T-shirt sales in the next two months are:
$$\begin{array} { | l | c | c | } \hline & \text { August } & \text { September } \\\hline \text { T-shirt sales } & 600 & 500 \\\hline\end{array}$$
The shop has projected it will be holding 120 T-shirts in stock on 1^st August.
Required:
If the T-shirts cost $4 each, what is the cost of T-shirt purchases to be made in August?

A) $2,160
B) $2,240
C) $2,320
D) $2,440
E) None of the above