<human>:  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?
<bot>: How much money did Carmen make at the green house? ** Carmen earned 3 * $4 = $<<3*4=12>>12 at the green house.
How much money did Carmen make for the mints? ** She earned 2 * $3.50 = $<<2*3.5=7>>7 for the mints.
How much money did Carmen make at the yellow house? ** She earned $7 + $5 = $<<7+5=12>>12 at the yellow house.
How much money did Carmen make at the brown house? ** She earned 9 * $2 = $<<9*2=18>>18 at the brown house.
How much money did Carmen make? ** So, Carmen earned a total of $12 + $12 + 18 = $<<12+12+18=42>>42.
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