It is my understanding that SuperSat will furnish you per item and per wash cost figures for each of their products. Having used their entire product line for over 9 years I can tell you that the advantages of powder are far more than just the cost of shipping water, however, that is an important one. Storage, fresh hot chemicals that you know are fresh mixed, ease of handling, easy titration on site, great results and colors include a few. I think the cost you are looking for is hard to determine unless it is going through your exact automatic. All automatics differ in application and chemical usage. Set up is important and Super Sat will do that, titrate your products, and give you those exact cost figures for your automatic. They do this at no charge and there is no guessing, just on site set up and comparisons. I would highly recommend their system and products. At the same time I think your exact cost will have to be calculated at your Wash and going through your automatic. My cost are belows 10 others that I tried before settling on SuperSat and my long term experience with them as my supplier has been a very good one.