Big Al's Tires and Oil expects profits from its oil division to be $18,000 next month. The tires that they sell cost $60 per tire and are sold for approximately $90 each. Which inequality shows how many tires Big Al's must sell in order to have a total profit of at least $24,000? 18,000+90x≥24,000 18,000≥24,000−30x 18,000≥24,000+90x−30x 18,000+60x≥24,000