Loralee's final stop is at the Big Bean Bakery, where she buys coffee and pastry every now and again. She likes the bakery because they have a self-serve machine for coffee where she can customise her own blend of coffee, milk, sugar and unique flavours such as fudge or toffee. There is a price menu on the side of the machine and at the bottom it says, 'Take your pick'.

Loralee prepares a large cup of her favourite sweet toffee coffee. As she goes to the counter, Peppie, who is at the till, tells her that the prices have actually gone up since Loralee last came in and the toffee addition will cost an extra $2?

a) Loralee pays the extra $2, but while she is in your office she wants to know whether she was actually obliged to pay the $2 more or not.