Whiskey makers have an unusual business model: They make a product today, and then let it sit in barrels in a
warehouse for 20 years before they sell it. Suppose that it takes $\$ 12$ of resources to produce a bottle of whiskey
today. How much will the whiskey maker have to charge for a bottle of whiskey in 20 years in order to make
spending that $\$ 12$ a wise investment? (Assume the whiskey maker faces market interest rates of $6 \% .)$