Matt has a peanut plantation that is 500 feet by 500 feet.  1 square foot of peanuts can make 50 grams of peanuts.  If it takes 20 grams of peanuts to make 5 grams of peanut butter and 1 kg of peanut butter sells for $10 how much does he make from his plantation?
Please reason step by step, and put your final answer within \boxed{}.
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