Vehicle trade in sale price

Purchased a car in 2018. Have used standard mileage.

Traded in on 7-19-2022 for a new 2022 and will use standard mileage.

When figureing the sale price of the trade in, is this correct?

*Trade in value given by dealer: $18,000.00

*Mulitply be businsess percent of 27.73%

*My 'Sale price business portion only = $4991.00

 

Thank you in advance.