Your company is using 30 workstations with Windows XP and 4 Windows 2003 Servers. Traditionally, you'd need to purchase 30 licenses of avast! Professional Edition and 4 licenses of avast! Server Edition.
That is, for a 1-year contract, you'd pay for 4 avast! Server Editions (4 x $339) and 30 avast! Professional Editions (30 x $20.95) - i.e., the final price would be $1984.50.
If you take the Suite approach, however, you'll simply pay for 34 licenses of the Suite, that is 34 x $34.95 = $1188.30. This is a $796.20 (40%) saving!