Math 116 Quiz 2 Name 2. The sales function for a product is given by S(x)=80+50x+400x23100x3, where x represents thousands of dollars spent on advertising, 0x8, and S is in thousands of dollars. Find the point of diminishing returns (i.e. the inflection point). Determine the amount spent on advertising as well as the sales in dollars (i.e. give both coordinates). Show all calculus steps for full credit. Point of diminishing returns: ( Amount Spent on Advertising: Sales in dollars