Jimmy earns $1.50 for every video game he sells. When he sells one carton of 30 video games, he earns an additional $10. What is the minimum number of video games he has to sell in order to earn $450?

Answer 1

1.50n + 10.00*floor(n/30) = 450
n = 246.7

Check:
246 games: 246*1.50 + 10*8 = 449.00

Add $1.50 for the 247th game, and that puts him over the top.