Midterm bribe

Let's face it, everyone has a price tage. After seeing the results of the midterm, I'll offer you a deal. Follow these directions, and I'll give you all perfect on the midterm.

1. Starting tomorrow, take a collection and give me 1 cent.
2. The day after tomorrow, take a collection and give me 2 cents.
3. On the day after that, take a collection and give me 4 cents.
4. On each subsequent day, take a collection and give me twice as many pennies as the previous day.
5. Continue this process for one month.

If you successfully complete the month, then you all get prefect on the midterm. Congratulations.