An automobile company is ready to introduce a new line of cars through a national sales campaign. After test marketing the line in a carefully selected city, the marketing research department estimates that the sales (in millions of dollars) will increase at the monthly rate of the following function fort months after the campaign has started. S'(t)=15-20e[Power-O.1t] 0< t< 22 A. What will be the total sales, S(+), t months after the beginning of the national sales campaign if we assume no sales at the beginning of the campaign? B. What are the estimated total sales for the first 9 months of the campaign? C. When will the estimated total sales reach $120 million? Use a graphing calculator to approximate the solution to the equation S(t)=120