How to: offer and ask for help

Ferran: A dinner in the sea is a good idea, Arnau.
Arnau: Yes, thanks. I'm looking forward to eat.
Ferran: Have we got everything?
Arnau: Well, we've got to much food, but, there isn't much to drink.
Ferran: Shall I get to buy a few cartons of coca-cola or something? There's a shop very near hear.
Arnau: Would you mind?
Ferran: No that's fine.
Arnau: thanks, Ferran. Could you get a fridge too? And we need a bag for the rubbish, or we can throw away in the sea...
Ferran: OK, no problem. I'll see what they've got.