Physical audiovisual media collections are at risk for extreme levels of loss if action is not taken to preserve them in the next 10-15 years. Most archives are well aware of this critical issue, but are unable to move forward with preservation projects because it is difficult to quantify the intellectual impact and cost impact of action or inaction in order to advocate and secure budgets. Our new Cost of Inaction Calculator provides graphics and metrics that compare resource expenditures, digitization and storage costs, and the rate of loss of physical media to help provide an approach to planning and advocating for preservation. This paper presents a sample case study showing how the COI model and Calculator can be used to support preservation efforts. This is a PDF version of an article that originally appeared in the International Association of Sound & Audiovisual Archives Journal No. 43, July 2014.