Let me guess, you’re shopping at an autonation dealer?
In california, you don’t pay upfront sales tax on the purchase price like this. Some dealers show a “purchase option” and a “lease option” on the same offer sheet, which can lead to confusion over what the actual terms are. This often lists different incentives, etc as well. Is that what you have in front of you?
Does the lease option area show the same rebate as what you’re expecting? I’ve seen cases like this where someone sees the purchase option side with the purchase incentives and assumes that means they’re applied to the lease as well.
The sell price is at public invoice (which tends to be off by 1-2% dealer published for some odd reason). You could push for more depending on if its worth it for you and if Autonation wants to move a looser deal (for them at least).
I’m not the dealer so I would not know their urgency to move this unit. If it needs to be moved, you’ll see them agree to that price after a little pushback.
As others have pointed out like @mllcb42 and quite comprehensively listed in other posts, present them your offer, with the RV, base mF, and standard fees and ask them yay or nay. Worst comes to worst they say no, and go from there.
Its not like the current offer would magically disappear (disclaimer unless this offer was obtained from weeks of grinding the dealer down with multiple price match requests).