Free U.S. Shipping (Hawaii and U.S. Territories additional cost) 1 Case = 4 (1) gallon bottles Dense concentrated liquid: 1 ounce to 1 gallon dilution rate 1 gallon concentrate = 128 gallons of disinfectant COST ANALYSIS: Germicidal Disinfectant Cleaner Cost Breakdown. 4 gallons per case Cost per Case = $199 ($49.75 per gallon shipping included) 1 Gallon = 128 ounces 1 ounce concentrate + 1 gallon water = 1 gallon germicidal cleanser 1 gallon concentrate = 128 gallons germicidal cleanser 4 gallons germicidal cleanser = 512 gallons germicidal cleanser 512 gallons at $199 per case including shipping = $.39 per gallon high-grade germicidal cleanser