As a reseller, where do I see suggested prices to my charge clients for the DWP component only?

As a reseller, where do I see suggested prices to my charge clients for the DWP component only?
 
I am aware different customers will have different needs and require varying -TBD attention to support them (change requests for  policy, new installs, whitelisting a domain, adding exceptions, requesting usage reports, etc., etc.). 
 
Still these questions must be asked by all resellers and some average range of charges must be known out there as "standard".  I don't want my customers to feel like they are being gouged but I need to make $ as well.  I could market bullet points what I offer that others perhaps do or perhaps don't and charge them accordingly 1x to 2x what the going rate is for less services.  But I do not kn ow what x is.without contacting resellers and asking them and since they might see me as a competitor, they may not reveal this nor might their website. 
 
Thanks