They basically are asking for the change in the maintenance budget as a result of the sales budget changing. You may think that you need to find the budget for maintenance before and after first but the change in the sales budget is actually the change in the maintenance budget. That is because the the money is transferred from the sales budget directly to the maintenance budget.
Since we know there are 3 quarts of pineapple juice and 2 gallons of orange juice the first thing you need to do is convert the units of the orange juice to quarts. If there are 4 quarts in a gallon and we have 2 gallons then we have 8 quarts (4*2) So 3 quarts of pineapple juice to 8 quarts of orange juice. The ratio would be <u><em>3:8</em></u>