Martha had 4 bottles of juice in the pantry + 4 bottles in the refrigerator = <<4+4=8>>8 bottles of juice.
After Martha went shopping she added 5 bottles of juice to the + 8 bottles she already had = <<5+8=13>>13 bottles of juice.
Martha and her family drank 3 bottles of juice during the week from the 13 they had, 13 - 3 = <<13-3=10>>10 bottles left.
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