Can you help with this estimate??

If I were to buy the following for a network of about 50 ppl what cost am i looking at
-2 Compaq proliant servers win2k(60 gig and 500memory)that is ready for connection to a network.
-35 desktops with win2k on them pentium 3 and 196 memory (they can be compaq or dell)
-15 average laptops pen 3 196 memory with win2K
-licences for about 50 pcs to run exchange and SQL clients
-4 cisco catalyst 2900 series xl switchs and a good acces points(about 6)for the laptops.

It will be a starting point for my research. Any advice will be appreciated.

Thanks.