The vinegar solution you have titrated cannot be sold, but the plant manager can't bear to discard 10,000 gallons of vinegar, even if it is too weak. At the Heinz vinegar factory, a second batch of vinegar has been made which is 8.25% by mass acetic acid. Calculate how many gallons of the strong vinegar would need to be added to the 10,000 gallons of weak vinegar to obtain a solution that is appropriate 5.10% acetic acid, by mass.