Tu dois préciser le choix de la personne.
Pour t'expliquer, sur le premier on dit "A combien est le tee-shirt ?" "Lequel ? Le noir ou le blanc ?"
2) How much is that camera ?
Which one ?
The big one or the little one ?
3) How much are the badges ?
Which ones ?
The left's ones or the right's ones ?
4) How much is that dress ?
Which one ?
The pea dress or the simple dress ?