Negotiating Packages Advice

Hi all, This is my first time attempting at negotiating at a dealership. I always hear people online saying negotiate for them to take off any additional packages you don’t want to pay for. But I’m scared they’ll say certain stuff are unremovable and I won’t know the better due to my inexperience. So, can anyone give me advice on which of these packages on a Prius Prime XSE Premium are negotiable? I know the advance tech and digital rearview are probably unremovable since it’s part of the trim upgrade.

Hi all, This is my first time attempting at negotiating at a dealership. I always hear people online saying negotiate for them to take off any additional packages you don’t want to pay for. But I’m scared they’ll say certain stuff are unremovable and I won’t know the better due to my inexperience. So, can anyone give me advice on which of these packages on a Prius Prime XSE Premium are negotiable? I know the advance tech and digital rearview are probably unremovable since it’s part of the trim upgrade.