Define inflation. Assume that you live in a simple economy in which only three goods are produced and traded: fish, fruit, and meat. Suppose that on January 1, 2010, fish sold for $2.50 per pound, meat was $3.00 per pound, and fruit was $1.50 per pound. At the end of the year, you discover that the catch was low and that fish prices had increased to $5.00 per pound, but fruit prices stayed at $1.50 and meat prices had actually fallen to $2.00. Can you say what happened to the overall "price level"? How might you construct a measure of the "change in the price level"? What additional information might you need to construct your measure?