Final answer:
Without a given rate of inflation or economic trend analysis, we cannot accurately predict the price of a gallon of milk in 2060. The reference provided is a list of prices and quantities but does not contain information regarding future projections.
Step-by-step explanation:
Projecting the future price of a gallon of milk in 2060 involves making an assumption on the rate of inflation or changes in market conditions, which is not provided in the question or the reference information. The reference information lists various prices and quantities sold in gallons but does not provide a time series or any trend that would allow us to accurately predict future prices.
To forecast future prices, economic models and historical data on inflation rates, production costs, and consumer demand patterns would be needed. Without such data, any prediction would be speculative and not grounded in proper mathematical or economic analysis.