So with the change to the Crane Style feats I will need to redo my 3 monk/1 sorc because that is what he was built around. I am having trouble figuring out the retraining costs and hoping someone can help me out. I need to retrain 1 level of monk to a fighter, 1 feat, and 1 level of sorcerer to a magus? I figure im level 4 so the cost would be 10x4x19 because 7 per level and 5 for the feat. So I calculate the total as 760g. Is this correct or am I missing something?
Well, first off, if you want to retrain Crane Style because the errata made it not work with your character concept/build as well as it did originally, then you should work with your GM to see if you can get a free retrain due to errata.
However, if that isn't an option, you mostly did the cost right. The only thing I see that you missed is that going from monk to fighter is considered to have retraining synergy so it takes 5 days instead of 7:
10 gp x 4 (level) x 17 (days) = 680 gp