How about doing your laundry for under $5/month (for a large family!) and avoiding all those nasty chemicals? Make your own laundry soap! We've been doing this for years and even use it on our cloth diapers! You will need:
1 Fels-Naptha soap bar
1 1/2 Cups Arm & Hammer Super Washing Soda*
½ Cup Borax
Grate soap or break into pieces and process in a food processor until powdered. Mix all ingredients. For light load, use 1 Tablespoon. For heavy or heavily soiled load, use 2 Tablespoons. Yields: 3 Cups detergent. (Approx. 30-40 loads)
*Arm & Hammer "Super Washing Soda"--Not baking soda--available in the laundry aisle of most grocery chains but not Walmart and Target. The Fels-Naptha soap bar is available in the same aisle of grocery stores. Borax can be found almost anywhere, including Walmart and Target.
Note: This soap will not make lots of soapy suds like regular laundry detergent. That is because it does not contain sodium laurel/laureth sulfates. It will also not make your clothes smell "fresh" because there isn't all that chemical fragrance. Those reasons, aside from the cost, are EXACTLY why we use this!!