Suppose that people consume only three goods, tennis balls, golf balls, and bottles of gatorade.
2006 price: T= $2 G= $4 B= $1
2006 quantity: T= 100 G= 100 B= 200
2007 price: T= $2 G= $6 B= $2
2007 quantity: T= 100 G= 100 B= 200
What is the percentage change in the price of each of the three goods?