Here's how Maricopa County AZ mail-in ballots are counted BEFORE sending to the County for the County to tabulate also…
Need to compare tabulations for Maricopa County with their printer, Runbeck Election Services (they have audit logs!)
https://www.youtube.com/watch?v=u_t1XTnhMMU&feature=emb_logo
https://runbeck.net/resources/