Bridge and Torch Crossing

Four people must cross a rickety bridge at night. They have one torch, and the bridge holds at most two people at a time. Anyone on the bridge must carry the torch, so the torch must be walked back for the next group. The four people walk at different speeds, needing 1, 2, 5, and 10 minutes respectively to cross; when two cross together they move at the slower person's pace. What is the minimum total time for all four to get across?