The total sales of a company (in millions of dollars) t months from now are given by the following formula S(t)-5t+ 10 (A) Use the four-step process to find S'(t). (B) Find S(15) and S'(15). (C) Use the results in part (B) to estimate the total sales after 16 months and 17 months. (A) S (B) S(15)= (Type an integer or a decimal.) S15-(Type an integer or a decimal) (C) S(16) (Type an integer or a decimal) s17) ~ (Type an integer or a decimal.) Enter answer in each of the answer boxes