According to that link it's $1350 for each subsequent year after the initial $1850 fee for the first year (which Network Solutions have offered to waive for her). Considering how they allowed transfers that were not "properly authorized" to take place they should have offered lifetime use of the service for free, and not use it as an opportunity to make $1350 in case she forgets to opt out after the first year.
If they do have the ability to stop domain theft, why not stop domain theft for free as part of their basic service as a registrar, instead of letting so many domains leave their accounts without the registrants authorization? There should be no need for registrants to pay $1350 a year to not have their domain stolen.
Looks like epik.com offer something similar for free.
Network Solution is a joke. I'm pretty surprised that they have a single customer. Stupid money grabbing irresponsible archaic registrar.