Arm & Hammer has a great laundry detergent!  Plus, it is on sale this week buy one, get one free.  There is also a $1.00/2 coupon you can use to purchase two bottles for $2.50 each!

Arm & Hammer Detergent, 60.5-75 oz $5.99, Regular Price 
Buy One Get One Free, On Sale thru 2/21
Use $1.00/2 Arm & Hammer Laundry Product from SS 02/12/2012 (exp 04/01)

Final Price: $2.50 each when you buy 2