Complex sentence: Headbands of Hope is a nonprofit organization that sells headbands; for each headband sold, $1 is donated to St. Baldrick's Foundation and one identical headband with be donated to the Four Diamonds Fund.
Split into simpler sentences: Headbands of Hope is a nonprofit organization that sells headbands. From each headband sold, Headbands of Hope gives $1 to St. Baldrick's Foundation and one identical headband is donated to the Four Diamonds Fund.