Sales tax on kit cars

[T-Rex]

It was bad enough when the lady at MVD charged me state sales tax when I registered my Factory 5 kit ($1100 !). Now, the city of Mesa wants a cut too. I got this letter today:

The state of Arizona has notified this office that you registered the above vehicle to a City of Mesa address and that you have paid the 6.6% State Use Tax.

This letter is to advise you that the City of Mesa also imposes a City Use Tax at the rate of 1.75%. This tax must be paid directly to the City of Mesa as the State does not collect the City Use Tax.

City Use Tax is imposed on items acquired from a retailer for which an equivalent City privilege (sales) tax was not charged at the time of purchase.

Please return this letter to this office with the amount due within 30 days.]

blah blah blah...

There are blank lines for "Vehicle Purchase Price", "Less Trade-In", and "Amount subject to tax". None of these are filled in.

Have any of you had to deal with this before? I'll call them tomorrow and see if I can figure out what's going on.

Thanks,

Rich