Originally Posted By: Hal Itosis
### OBS/NB: all sizes in gigabytes. ###

<snip>

for s in ${!size*}; do ((tSize+=$s)); done # note: Bash math ignores the R.

Probably should mention that —as written —these scripts only handle integers for gigabyte values. The basic $(( 2 + 2 )) syntax will refuse floating point numbers like 4.56 + 7.89 (yet diskutil would happily accommodate same).

So either change the code which calculates the total, or remember to only use integer values. Perhaps edit that one line to read:
Code:
### OBS/NB: all sizes in "whole number" gigabytes (i.e., integers only). ###