Snag cheap Arm & Hammer laundry detergent at Walmart! Use a coupon with no size restrictions. The smallest bottle at Walmart costs $2.83. Buy two, use the coupon, and pay only $1.83 per bottle!

Use one $2.00/2Arm & Hammer Laundry Detergents (coupons.com)

Final Price: $1.83 each, when you buy 2