use special price on use events for VE calcs if it exists
use special price on use events for VE calcs
if it exists

thierrymarianne/valuenetwork,FreedomCoop/valuenetwork,django-rea/nrp,thierrymarianne/valuenetwork,valnet/valuenetwork,simontegg/valuenetwork,thierrymarianne/valuenetwork,valnet/valuenetwork,simontegg/valuenetwork,valnet/valuenetwork,simontegg/valuenetwork,valnet/valuenetwork,FreedomCoop/valuenetwork,django-rea/nrp,django-rea/nrp,FreedomCoop/valuenetwork,FreedomCoop/valuenetwork,simontegg/valuenetwork,django-rea/nrp,thierrymarianne/valuenetwork