Tickets to a Ballet Cost $\$ 15$ If Bought in Advance $\$ 24$

Multiple Choice

Tickets to a ballet cost $\$ 15$ if bought in advance. If bought on the date of the ballet, they cost $\$ 24$ . For the ballet to make a profit, the total money collected from ticket sales must be at least $\$ 390$ . Write an inequality to represent this situation.

A) $15 x+24 y \leq 390$
B) $15 x-24 y \geq 390$
C) $15 x+24 y \geq 390$
D) $15 x-24 y \leq 390$