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Bob produces DVD movies for sale, which requires a building and a machine that copies the original movie onto a DVD. Bob rents a building for $30 per month and rents a machine for $20 a month. Those are his xed costs. His variable cost per month is given in the accompanying table. [0m Variable Cost Assume that DVD production is a perfectly competitive industry and Bob is currently operating in the short-run. If the current market price for DVDs is $7, then, in order to maximize prots, Bob should produce ________ DVDs and would earn prots equal to O Q=0;-$50 O Q=0;$0 O Q=3;$12 O Q=5;-$35 OQ=5;$15