License fees for a manufactured home registered pursuant to the provisions of Section 20 of this act shall be as follows:
1. Where the actual retail selling price, excluding Oklahoma state taxes, is One Thousand Five Hundred Dollars ($1,500.00) or less, the registration fee shall be Twenty-five Dollars ($25.00);
2. Where the actual retail selling price, excluding Oklahoma state taxes, is in excess of One Thousand Five Hundred Dollars ($1,500.00), the registration fee shall be Twenty-five Dollars ($25.00) plus seventy-five cents ($0.75) for each One Hundred Dollars ($100.00) or any fraction thereof, in excess of One Thousand Five Hundred Dollars ($1,500.00).