Support cost is a prorated value based on 40% of the initial cost. Consider the following example:
Original purchase date
Number of copies
Cost
Support cost
January 01, 2010
2
$98
$39.20
June 30, 2010
2
$98
$19.60
Total cost of renewal on January 01, 2011
$58.80
In the example above, you have purchased 4 machines licenses for Syncrify. The support contract for all four of them ends on January 01, 2011. Since you purchased the later two copies just six months ago, you owe half the amount.