A machine must last at least 7.5 elections to break even vs. hand counted ballots
and possibly as many as 685.714285714286 .
Human cost per ballot counted $0.0583333333333333-$0.333333333333333.
Santa Barbara, CA example:
$1,300,000 spent on a 200 machine system to count 100,000 votes per election.
$6500 per machine, counting 500 votes each.
View vote_tco source (perl)