Carmen is selling girl scout cookies. She sells three boxes of samoas to the green house for $4 each; two boxes of thin mints for $3.50 each and one box of fudge delights for $5 to the yellow house; and nine boxes of sugar cookies for $2 each to the brown house. How much money did Carmen make? Think carefully first, then make a decision:
Carmen earned 3 * $4 = $12 at the green house. She earned 2 * $3.50 = $7 for the mints. She earned $7 + $5 = $12 at the yellow house. She earned 9 * $2 = $18 at the brown house. So, Carmen earned a total of $12 + $12 + 18 = $42. So, the answer is 42.