Clara is selling boxes of cookies to raise money for a school trip. There are 3 different types for sale. The first type has 12 cookies per box. The second type has 20 cookies per box, and the third type has 16 cookies per box. If Clara sells 50 boxes of the first type, 80 boxes of the second type, and 70 boxes of the third type, how many cookies does she sell? Let's be accurate as possible.
Clara sells 600 cookies of the first type because 12 * 50 = 600. She sells 1600 cookies of the second type because 20 * 80 = 1600. She sells 1120 cookies of the third type because 16 * 70 = 1120. Thus, Clara sells 3300 cookies total because 600 + 1600 + 1120 = 3320 cookies.
The answer: 3320.