W = Woman; S = Shop assistant
W: Hello. I was wondering if you’ve got any of that stuff you use for cleaning swimming pools.
S: Um … yeah, we usually sell a liquid cleaner.
You pour it into the pool. There’s one here.
W: Can I have a look?
S: Yep.
W: How much is it?
S: Er, this one’s £28.99 for a liter bottle.