80 US cups per 640 fl oz
80 cups is 640 fluid ounces. (US)
There are 640 cups in a gallon
80 US cups = 640 US fluid ounces
21.64 fluid ounces.
640 mL is about 21.641 US fluid ounces.
640 mL is about 21.641 US fluid ounces.
640 mL is equal to approximately 21.6 fluid ounces.
That is 640 ounces.
640 oz
10quart=320 fluid ounces 20quart=640 fluid ounces
If 240 ml = 1 cup=8 0z then it would be 2/3 cup so 160 x 4=640 ml 640/240=2.66 cups of water in the morning you should drink before brushing teeth then do not eat or drink for 45 mins
That is 20 quarts.