Another great demand and supply in action to help you revise. The afternoon of the Royal wedding Debenhams saw sales of fake tan rise by 219% compared with the same day last year. It would seem that people saw the wonderful glow of Kate and Pippa Middleton and wanted to be like them - F in PASIFIC.

Have a go at drawing a demand and supply diagram to show this change in the market for fake tan. It is so important to make sure you fully label your diagrams in the exam - there are marks for labelling P and Q correctly as well as the demand and supply curves.

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