The estimated cost of 1 additional month of service is:
$
1
The estimated cost of 1 additional year of service is:
$
The estimated cost of 2 additional years of service is:
$
The estimated cost of 3 additional years of service is:
$
The estimated cost of 4 additional years of service is:
$
The estimated cost of 5 additional years of service is:
$
1To get an estimated cost for additional months of service (less than one year), multiply your estimated cost of one month of service by the number of months you wish to purchase.