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10 2 $begingroup$ Challenge Taken with permission from my University Code Challenge Contest After finishing her studies a couple of months ago, Marie opened a bank account to start receiving the payment of her first job in town. Since then she has been performing a few transactions with it. Her first payment was $1000 dollars. With that money she paid for a dinner in which she invited her parents (The dinner cost $150 dollars), then, she did a purchase in a well-known supermarket ($80 dollars) and a hotel reservation for her vacations ($200). At the end of the month she received her payment again (1040 dollars, a little more than the previous month) and the day after she spent another $70 dollars at the supermarket. Today, she realized that if after paying the first $80 dollars in the supermarket a second acco