Extra as a discount

Hi,
I explore two issues that I can't solve.

1. I need add to my tariff option "with" or "without breakfast". Without it will be -80 from total price per person/per night, with 0.
I used Extra "breakfast" and tried to enter the prize -80,- isaved it. After save was in price 0. Is there a way to remove the fuse? Is there any better solution?


2. I need reduce my check-in form by few fields. How to do it?



Thanks!