DH and I saw this earlier in a hospital cafe and had a long pointless discussion over it, so naturally I need to know what MNers think 
Cafe has three tiers of sarnie: cheap ones (cheese/houmous/coleslaw), middling (ham, chicken tikka) and expensive (prawn, can't remember what else)
Procedure is you order your sandwich, it's wrapped in a bag and then you take it along the queue to the till where you order drinks etc. Till person asks you what sandwich you've got and you pay.
Woman in front of us ordered a prawn sarnie with extra salad and coleslaw. Takes it to the till, is asked "what have you got?" and replies "Cheese". Pays the cheaper rate.
Is she a cheeky sod? Or is it fair enough? I have too much time on my hands