I'm pretty sure I read in one of these forums how to compare the cost of bleach when sold in different concentrations, but I just can't find it. If that didn't make sense, here's an example:
If 1 gallon of 6% costs $2 and 1 gallon of 12.5% costs $3.50, which is the better buy? Can I solve it like this? I think this may have been how the other poster figured it, but I just can't remember and my math skills are not the best.
100/6=16.67 x $2= $33.33
100/12.5= 8 x $3.50=$28.00
So if I was buying a 1 gallon bottle of 100% bleach (my clothes would never be the same) the 12.5% at $3.50 per gallon is the better deal. BTW...I have no idea what12.5% actually costs, so if my numbers are really low, I hope no one got excited that I had found it cheap somewhere