Terry runs a snowplowing business. income from snowplowing is given by the function f(x)=35.5x+6 , where f(x) is the income in dollars and x is the snowfall in inches received during a winter. if during the years 2006 to 2011. terry's town received 53,42,55,63,58, and 47 inches of snowfall, what was his income (in dollars) during those years?