I am trying to "sell" a BIZ car used ~ 10% in BIZ for 5 years. Used just SL depreciation.

On the input screen: Depreciation - Details - Disposition - do I enter the entire sale price or should I pro-rate it for the BIZ portion of the car only?  I entered the whole amount of sale, and the 4797 does not look correct to me.

Thanks community