A high school class wants to make at least $1500 by hosting a dance. The class knows that they will make $500 in refreshments.

Part A:
If the class sells tickets for $5 each, write an equation that could be used to determine the number of tickets, n, the class would need to sell in order to make at least $1500. Explain your reasoning.

Part B:
Determine the minimum number of tickets that the class would need to sell in order to make at least $1500.