We have a PHP based website (using osCommerce) selling mobile phones. The phones can be sold in two ways: handset only, and phones which come connected to a phone network. There are five networks, and each network offers several different types of tariffs. The price of the phone depends on which network and tariff it is sold with. We'd like to upload an Excel spreadsheet of the different tariffs available, and the prices of the phones for each tariff. There are also extra promotional items that go with most tariffs. Listings of which networks are available for each phone should appear beside the phone description. The project requires work on our MySQL database.