options: m : okay , here you are . $ 3.50 for this red bag . m : okay , here you are . $ 4.50 for this red bag . m : okay , you did a good choice to buy this blue bag . m : great ! $ 3.50 for this yellow bag . could you please pay in cash ?
article: f : how much are these bags ? m : the red ones sell for $ 3.50 each , and the blue ones for $ 4.50 each . f : i 'll take the cheaper one then .