Change Labels on MSRP, Default Price (Base Price) and add MAP to price management block

Good afternoon. I would like to change the labels on these fields in the Items screen (and any other price related screens). I thought it was something with Translations, but I couldn’t find these fields anywhere in translations. 

I want to change MSRP to Retail, Default Price or Base Price to Our Price and then I want to add the MAP price block to the Price Management tab above MSRP.

I was hoping to accomplish this with out creating a customization project.