In HP Tuners it's Base AFR vs ECT and then it adds fuel with a table called ADD vs RPM.

So it's 12.40 + the add vs rpm table that brings in more fuel depending on rpm and how long you are in PE (power enrichment). Most just zero out the add vs rpm table and make the commanded AFR a straight 11.5 or whatever they choose.

I don't have DHP so I forget what they might call them exactly.