Girl Scout cookie sales started back in 1917. In addition to raising money, cookie selling is also meant to make the girls more business savvy. The Girl Scouts say it's the largest girl led entrepreneurial program in the world. And now, some of that entrepreneurship is happening online. Marketplace’s Stephanie Hughes spoke with Wendy Lou, who oversees the cookie program as the chief revenue officer at Girl Scouts of the United States of America. She says last season, digital transactions accounted for more than 40 percent of cookie sale revenue.