a theater sells a combo pack of popcorn, a soft drink, and a movie ticket for $12. For groups of 5 or greater, the theater gives a group discount of $3 per person, what is the total cost for a class of 30 students
If the standard price is 12 dollars and the price for groups is 3 dollars less (12 - 3 = 9 dollars) per person, then in 30-people group the total price would be 9 * 30 = 270 dollars.
