He makes 3 batches of baguettes a day, 48 per batch so he makes 3*48 = <<3*48=144>>144
He sells 37, then 52 then 49 baguettes for a total of 37+52+49 = <<37+52+49=138>>138
He had 144 to sell and he sold 138 so he has 144-138 = <<144-138=6>>6 left over
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