You recently started a small affiliate marketing service Last month, you spent 1,000 on a Pay-Per-Click (PPC) online advertising campaign that resulted in 1,200 in sales. What was last month's Return on Investment (ROI)for your affiliate marketing service? .2% 120% 20% 80%

To calculate the Return on Investment (ROI) for your affiliate marketing service, we need to use the following formula:ROI = (Net Profit / Cost of Investment) x 100In this case, the net profit is the difference between the sales and the cost of the PPC campaign, which is 1,000 = 200 / 20\%$.