A standard bottle of wine is 750 milliliters (ml), meaning a case of 12 bottles contains 9 liters, or 2.378 gallons. At 150 gallons per ton, a ton of grapes becomes 150/2.378 gallons per case, or a little more than 63 cases of wine. With 12 bottles per case, we have 756 bottles in total.
But how many grapes are we talking about? We can go about this two ways. With the numbers we have, we can see that one bottle is about 1/756 or about 0.12% of a ton. 0.13% x 2000 pounds per ton is close to two and half (2.6) pounds of grapes per bottle. A grapevine might have seven pounds of fruit (or more, or less), so with 2.6 pounds of fruit per bottle, one vine can produce between two and three bottles of dry wine.
1,600 grams of sugar can increase the volume of wine by one liter, so if 2,000 (7,570 liters) gallons of dry wine is going to be sweetened to 50 grams/ liter of residual sugar (5%), we're adding 50 x 7,570 = 378,500 grams of sugar. 378,500 divided by 1,600 grams per liter equals 236.5 liters, or 62.5 gallons. This number might impress you or it might not, but the winery now nearly has the equivalent of 26 cases of wine (236.5/9 liters per case) to sell that is actually sugar.