This year marks the 100th year of the first known sale of cookies by Girl Scouts, with about a week left of cookie sales for more than 17,000 Girl Scouts in central and northern Arizona. In honor of this milestone, we asked former Girl Scouts how their involvement in the nonprofit organization helped them become successful in their careers. Click on the Girl Scouts photo to see how the nonprofit organization has shaped their lives. Many Valley business leaders who were Girl Scouts continue…