Ensure that the Solver add-in is installed. IOpen Solver. Set the objective cell as $b$20 to a Value Of 0 and set the Variable Cells to $b$16,$b$18 (be sure to type the comma between the two cell references) to change both the growth rate in cell 816 and the costs related to Sales % in cell 818. Click Solve. Save this scenario as 16% Growth and then restore the original values