MH Licensing costs in NV, AZ and Utah?

I called the Arizona motor vehicle department this morning and they quoted a registration fee for my 37 foot 2007 TropiCal d.p. at $481.00. Which didn't make sense based on the figures presented by others but I will go with their call. I think this type of confusion (i.e. potential discrepancy between what Arizona DMV folks have told me and what I will be charged when I go to register next week) is just why I asked fellow RVers for what their actual real life registration fees were instead of calling DMV in the first place. I am expecting it to be much closer and slightly higher than the approx. $620 FIRE UP paid to register his rig.