1. Suppose you conduct a contingent valuation survey based on the question “If a program to avoid future oil spills in the Gulf of Mexico would cost X dollars, would you support it?”. You have 4 versions of the questionnaire with different values of the program’s cost X: 5, 10, 15, 20. You obtain the following percentages of individuals who answer “yes” to the question.

Survey	Cost of program (X)	Percentage Yes
A	5	80
B	10	65
C	15	30
D	20	20

Assuming that your survey sample is representative of 100 million households, calculate the total willingness to pay (in million dollars) for the program using the method presented in class.