Home Slickdeals Amazon has Arm & Hammer Baking Soda, 80 Ounce (5lbs) for $3.41... Slickdeals Amazon has Arm & Hammer Baking Soda, 80 Ounce (5lbs) for $3.41 or $3.24 with 5+ S&S items & Free Shipping By ARCOM - 15 August 2019 142 0 SHARE Facebook Twitter Go to the deal page: Amazon has Arm & Hammer Baking Soda, 80 Ounce (5lbs) for $3.41 or $3.24 with 5+ S&S items & Free Shipping