On the first day, they traveled 5*7=<<5*7=35>>35 miles.
On the first part of the second day, they traveled 6*6=<<6*6=36>>36 miles.
The second part of the second day, at half their morning speed, they traveled (6/2)*3=<<6/2*3=9>>9 miles.
On the final day, they traveled 5*7=<<5*7=35>>35 miles.
In total, they traveled 35+36+9+35=<<35+36+9+35=115>>115 miles.
#### 115