In Chapter 5 of Data Driven by Jenny Dearborn, the sales analysis team found that the Win Rate for new business proposals was 25% and the Win Rate for upselling proposals, i.e. selling more products to an existing customer, is 80%. If a sales representative has a $2 million-dollar sales goal for the year and existing accounts have an average deal size of $50,000; how many upselling proposals must the sales representative plan to make during the year to achieve their sales goal using only upselling business?