We have introduced a lot more flexibility to price display formatting in WHMCS 7.1. You will now be able to customise the display format of all pricing values within the client area via the templates if you need something other than the default formats offered. Documentation on this can be found in the Version 7.1 Release Notes: https://docs.whmcs.com/classes/7.1/WHMCS/View/Formatter/Price.html