Mrs. Lavender, a saleswoman based in Exeter, has to visit the local towns shown on the map to sell cosmetics. The numbers on the roads give the distance in miles between the towns. What is the shortest route she can take which will both start and end at Exeter? Please enter your answer as a number only.
please explain
The shortest way is the perimeter, which is $23+16+11+8+24+10=\boxed{92}$