On a clean machine with operating system version 703 installed, and the G1G1 Activity Pack, the free space available on the drive can be obtained in the terminal by typing
df -h
It gives that 352 Mbyte is used, and that 673 Mbyte is still available.
After the binary tarball of bibledit was copied and installed, the free space was 644 Mbyte. This means that bibledit used up 29 Mbyte. If the original tarball would have been deleted, about 13 Mbyte would have been freed. After git-core was installed the free space was 621 Mbyte. That means that git-core and its dependencies used up 23 Mbyte. After gtkhtml3 was installed, the free space was 606 Mbyte. This means that the package and its dependencies used 15 Mbyte.