That is 640 ounces.
That is 1,152 fl oz.
32 oz in a quart, so 128 in a gal, so 640 in 5 gal.
Assuming you mean 12.6 fl oz, I guess you're American (using the oz abbreviation for fl oz), thus: 1 gal = 128 fl oz → 5 gal = 5 × 128 fl = 640 fl oz → 640 fl oz ÷ 12.6 fl oz ≈ 50.79
That is 640 fl oz.
640 ounces equal 5 gallons or you can just multiply 128 ounces 5 times and it will equal an amount of 640 ounces
That is approximately 1.1 US gallon
5 US gallons equal 640 fluid ounces.
4 gal = 512 fl oz
(6 oz per 100 gal) times (20) = (120 oz per 100 gal), or (1.2 oz per gal) .
128 oz
640 oz