The assumptions made for these calculations are as follows:

Cost per server (hardware and server software licenses) - £5000
Cost per office network (hardware and cabling) - £500
End user training - £150
Administrator training - £500
Consulting for setup - £1500
User support costs - £100
IT support/maintenance - £500 per annum
IT upgrades (after 3 years) - £5000
General administration - £500 per annum