Enigma translation Website calculator

We are in the market for an instant online quote/estimate calculator to be build into our existing website www.enigmatranslation.co.uk. We want to be able to offer immediate prices to those visiting our site, and then if they are interested they can email us the document for us to confirm the price and the order. It needs to be as simple as possible, and we would need to be able to update it on a regular basis. The calculator would need to calculate 14 languages fro english, and from english to 14 languages, the price is based on the number of words in the document and the language combination, so it would need a scroll down bar for the client to select the language of their document(source). then a scroll down bar to select the target language, and a box to enter the total word count, so English to french is say £97.00 per 1000 words, the total word count is say 2359 words, the estimate comes up on the screen as £228.82 plus [login to view URL] can then enter all their contact details, deadline, and be able to browse for their document, download it to us, with a copy of the estimate, and a copy sent to themselves, wereupon we can act on the email once it is received. There is a similar function found on [login to view URL]