Give the step-by-step reasoning process and then the final answer. Robby, Jaylen and Miranda are employed at a Cheesecake factory, earning $10 per hour. They work 10 hours a day, five days a week. Robby saves 2/5 of his salary, Jaylene saves 3/5 of his salary, while Miranda saves half of her salary. What are the combined savings of the three employees after four weeks?
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In a day, each of them earns $10 / hour * 10 hours / day = $100 / day. The total number of days each of them work in a month is five days per week * 4 weeks = 20 days. If each of them earns $100 per day, in 20 days, they'll earn 20 days / month * $100 / day = $2000 / month. Robby saves 2 / 5 * $2000 = $800 from his salary. Jaylene's savings is 3 / 5 * $2000 = $1200 of her salary. Miranda saves 1 / 2 * $2000 = $1000 from her salary. The total saving for the three employees is $1000 + $1200 + $800 = $3000.
The final answer: 3000.
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