It helps if you educate yourselves about Catholic faith before posting such inanities, and on this thread ignorance cannot be your excuse.
The punishment of purgatory is for those redeemed; thus their redemption is not contingent upon anything.
The Eucharist is not a new sacrifice and it is not performed by a priest in his own person, in the manner of the Hebrew priests.
Well enlighten me then as to just what Mass is all about.