Statins are used to keep cholesterol in check and are a top-selling drug in the U. S. The equation: S−1.4x=5.9 gives the amount of sales ( S ) of statin in billions of dollars x years after 1998. According to this equation, how much will/did people in the U. S. Spend on statins in the year 2008? People in the U. S. Will spendbillion dollars on statins in 2008.