Average price is $3.27/gallon in December. Source: https://www.ams.usda.gov/sites/default/files/media/RetailMilkPrices2018.pdf https://www.ams.usda.gov/sites/d

Average price is $3.27/gallon in December. Source: https://www.ams.usda.gov/sites/default/files/media/RetailMilkPrices2018.pdf https://www.ams.usda.gov/sites/default/files/media/RetailMil...