Pliego Carrasco compared the size and type of the errors in the different polling places, sorted according to who won the polling place. For example, for polling places in which the number of ballots issued to the polling place is different from the number of votes tallied plus the number of leftover ballots, he gives the table below. The FCH column gives the number of polling places where Calderón received the most votes that exhibited that type of error, while the AMLO column shows the number where López Obrador received the most votes. Undervotes refers to the case where the number of votes tallied plus the number of leftover ballots is less than the number of blank ballots allocated to the polling place, while Overvotes is the case where the number of allocated blank ballots is less than the votes tallied plus leftover ballots. The numbers are also taken from the PREP.