Consider a simple economy that produces two goods: apples and muffins. The following table shows the prices and quantities of the goods over a three-year period. Base year is 2014.

Apples Muffins Price Quantity Price Quantity Year ( Dollars per apple) (Number of apples) (Dollars per muffin) (Number of muffins) 2014 145 2 195 2015 2 165 4 225 2016 3 110 4 165