Talk:Cumulative Costs/Home Village/@comment-16227313-20130913023707/@comment-2170536-20130913035634

Actually 22 days is correct. This is the cumulative costs table that gives you the sum of every upgrade available at each level. In the case of Hog Riders, there are four total upgrades available (five total levels):

Town Hall 7: level 2 (8 days)

Town Hall 8: level 3 (10 days) and level 4 (12 days)

Town Hall 9: level 5 (14 days)

As you can see, you have 22 days' worth of available upgrades for the Hog Rider at Town Hall 8, with a total of 44 days at all levels (the final column).