Return on investment (ROI) is provided by investment in marketing, ROI is determined as perement les mes gross marginmus marketing Investment, al divided by marketing investment Suppose that a company plans to spend $3 million to place search engine ads and expects $16 million in incrementales gross margin is estimated to be 45% Use the spreadsheet to predict how ROWE change the incremental sales estimate is wrong (consider a range of vakes above and below the expected sales) Incremental sales Gross margin Marketing Investment $15.000.000 45% $3,000,000 Marketing ROI The instructions for calculating ROI in the text Incremental sales Marketing ROI $10,000,000 $11,000,000 $12.000.000 $13.000.000 $14,000,000 $15.000.000 $16.000.000 $17.000.000 $18.000.000 $19.000.000 $20,000,000 ASS