Watershed is a media services company that provides online streaming movie and television content. As a result of the competitive market of streaming service providers, Watershed is interested in proactively identifying will unsubscribe in the next three months based on the customer's characteristics. For a test set of customers, the file Watershed contains an indication of whether a customer unsubscribed in the past three months and the classification model's estimated unsubscribe probability for the customer. In an effort to prevent customer churn, Watershed wishes to offer promotions to customers who may unsubscribe. It costs Watershed $$10$ to offer a promotion to a customer. If offered a promotion, it successfully persuades a customer to remain a Watershed customer with probability $0\mathrm{.}6,$ and the retaining the customer is worth $$70$ to Watershed.