Village Foods is having a sale on fresh vegetables. If they get 600 customers per month, and each customer purchases 3 heads of lettuce for $1.50 each and 5 tomatoes for $0.75 each, but the store is giving a 10% discount on the total purchase of lettuce and tomatoes, how much money, in dollars, will the store receive in sales of lettuce and tomatoes per month after the discount? Let's think step by step and output the final answer within \boxed{}.
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