Not as foolproof as you might think. There is a video showing how the "vote record" card can be preload with zero votes. Mins 100 votes for the lose, and +100 votes for the winner. Total, before ballots are cast, zero, the correct total.
Just add the fraud votes before counting starts, piece of cake.
Well no, a much greater ERROR is added, and more easily detected by the Exit Poll 2% Standard used to determine voter fraud while monitoring foreign elections.
TOTAL FIRST forces cheaters to cheat greater, more Fraud Votes, means more obvious Fraud.