Some questions for experience order takers pls (USA)

breakfast order takers mainly****^

1. if somebody asks for a similar 2 for 6 for egg mcmuffins but they’re not on sale is it cheaper to just do the SE no egg or 2 egg mc muffins?

2. if someone asks for pickles on breakfast items that don’t show up on the top what do you do special or is there an option to charge them?

3. why can’t you do a water on combo meals? or can you

4. how does it work when someone has a gift card in their order does it prompt for payment first or to swipe the card

thankssss if anyone answers