Cherry put up a delivery service. She charges $2.50 for a 3-5 kilograms cargo and $4 for a 6-8 kilograms cargo. If she delivers four 5 kilograms cargo and two 8 kilograms cargo per day, how much money will she earn in a week? Let's answer step by step:
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Cherry earns $2.50 x 4 = $10 after delivering four 5 kilograms of cargo per day. She earns $4 x 2 = $8 after delivering two 8 kilograms of cargo per day. So, her total earning per day is $8 + $10 = $18. Therefore, she will earn $18 x 7 = $126 in a week. The answer: 126.
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