Arm & Hammer Soda Laundry Booster & Cleaner $3.99 at Amazon

amazon.com has 55oz Arm & Hammer Soda Laundry Booster & Cleaner for $4.99 – $0.75 off coupon (checked save an extra box, eligible on first S&S order for this product) – 5% off with Subscribe & Save (cancel at any time) = $3.99 with free shipping on $35+ or with Prime.