It tells you to count the lumber it says right answer is 106 but that is incorrect

Storehouse says has 68
But 9 are damaged
13 been delivered
1 broken
Next lumber counts as 24
Then finally counts as 11

The math for question is
68-9-13-1+24+11 which is 80 stacks of lumber
The broken and delivered ,damaged are token away from total due to not being in condition to be used