When does the plane take off? Which photocopier do they decide to buy?

M: When does the plane take off?
F: It has been arranged to take off at four fifteen but it’s delayed thirty minutes.

A: SO which of thee photocopiers should we buy?
B: This one looks nice, the R30.
A: Hmm. Bit expensive. The BR 200 looks fast. It does 25 copies a minute.
B: So does the CM 100. And it’s cheaper and smaller.
A: But it hasn’t got many functions, has it?
B: That’s true. OK, we’ll get the bigger one.