Nataraj (2007) finds that a 100% increase in the price of water for heavy users in santa cruz caused the quantity of water they demanded to fall by an average of 20%. (before the increase, heavy users initially paid $1.55 per unit, but afterwards they paid $3.10 per unit.) in percentage terms, how much did their water expenditure (price times quantity)long dashwhich is the water company's revenuelong dashchange? with the price increase, the company's revenue changed by .31 nothing%. (enter your answer rounded to two decimal places.)