Theoretically you will get a whole rainbow of colors. Salamanders at least carry, irid and red genes, plus other genes that makes the mutation possible. White platinum at least carries NR1, cambodian, irid, metallic (copper). IMO you will at least get some irid colors (rather pale), salamander (more to a cambodian shade), cambodian (red and irid), multi white. The out come will also be affected by background genes which we don't know.
TBH I have no experience with dumbo ears. But again theoretically you will get 100% dumbo ear geno. IME when mixing genes, you should get half dumbo ear (bigger than normal but not really dumbo). You need to spawn for F2 and 3 to get fixed dumbo ear salamander.