A firm may use a Return on Marketing Investment (ROMI) calculation to determine the effectiveness of its investment in marketing. This calculation can be performed a few ways, one of the most simple methods is to divide the increase in gross profit (minus the marketing cost), by the marketing cost. For example, if an ad campaign costs 5,000 and gross profit increases by 10,000, then the ROMI would be (10,000-5,000)/5,000)=100%. The return on Marketing Investment would be 100%.