You design websites for local businesses.

You charge Php2000 per website, and currently sell 12 websites per month.

Your costs are rising (including the opportunity cost of your time), so you consider raising the price to Php2500.

The law of demand says that you won't sell as many websites if you raise your price. How many fewer websites? How much will your revenue fall, or might it increase? Explain how you are going to answer the questions.