Homework: Homework 3D If it cost $16 to fill a gas tank in 2000, how much would it have cost to fill the same tank in 1960? < Question 12, 3.D.13 Average Gasoline Prices (per gallon) Price as a Percentage It would have cost $ in 1960. (Round to the nearest cent as needed.) Price Index Year Price of 2000 Price (2000-100) 1960 $0.31 19.9% 19.9 1970 $0.36 23.1% 23.1 1980 $1.22 78.2% 78.2 1990 $1.23 78.8% 78.8 2000 $1.56 100.0% 100.0 2010 $2.84 182.1% 182.1