If your question is that you have four gallons of cider and you are going to serve it in eight oune cups, will you have enough to serve to 30 people; then the answer is yes. You would have enough to serve 30 peopole 2 servings each and still have cider left.
1 fluid ounce = 0.00625 gallons.
If you assume everyone will have two 6 ounce glasses that would be about 10 gallons
1 fluid ounce contains 0.0078125 US gallons.
You would need 7.5 gallons to get 120 8 ounce servings.
4.05 US gallons.
40 gallons = 5120 ounce
To find the cost per ounce for each bottle, divide the price by the number of ounces. For the 34.7-ounce bottle at $2.09, it costs approximately 6.02 cents per ounce ($2.09 / 34.7). For the 24.6-ounce bottle at $1.99, it costs about 8.09 cents per ounce ($1.99 / 24.6). Thus, the 34.7-ounce bottle is cheaper per ounce than the 24.6-ounce bottle.
One fluid ounce is 0.0078125 gallon.
You can fill approximately 123.2 16-ounce cups with 15.5 gallons.
One gallon = 128 fluid ounces Therefore, there is 1/128 gallons in one ounce. 1/128 = 0.0078125
1 ounce
one tenth