I am doing a walk for Lou Gehrig's disease on Oct. 4 (for my aunt), and I want to raise $250. To raise this much, I would have to get 50 people to donate $5 each. How many people should I contact to insure that I am able to get 50 donations? Do half of people asked to donate in a letter writing campaign give donations, a third, or some other fraction? What is your experience? Thanks.
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