So try this: Put the cursor at the beginning of the text that you want to count, click and hold the cursor button down and drag the cursor to the end of the 5 pages. Word will then show you the number of words highlighted within the total number of words in the document. 

You could also save the file under a new name rename the file and then delete all the previously edited text and then you'll have a 5 page document.

A typical page has about 250-300 words, so my guess is that we're dealing with 1,800 words. But for pricing purposes we need the exact number.