The price would be increased by 30% or more depending on where you live.
A $30,000 car would be in excess of $39,000 after the federal gross payment tax.
If you live in a state with a 7% sales tax it would be:
$30,000 + 7% = $32,100
Plus license fee(?)30% tax on fee's too)
Plus $9588.00 (23% "of the gross payment" tax)
Total....$41,688.00 (not incl. license or 30% tax on license fee)
( .23 X $41,688 = $9588.00)