suppose that, in the base period, a college student buys 20 gallons of gasoline at $2 per gallon, 2 cds for $13 each, and 4 movie tickets for $7 each. in the next month, the price of gasoline is $2.25 per gallon, cds cost $12.50 each, and the price of a movie ticket is $7.50. the change in the price level from the first to the second month is:
