SUM
(ft-in)
SUM
(inches only)
FT IN IN
0 0 0

INPUT conversion
to inches
# FT IN IN
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
10 0
11 0
12 0
13 0
14 0
15 0

I feet, therefore I add

-Daycart