In addition to our membership we have training programs offered which are for people new to the sport so most are not members but some have already joined. All must be members so we include the cost of membership in the quoted cost of the program. If the individual is already a member, we will charge them $25 less (the cost of membership). The form, as you have it, asks them if they are a member - then please log in. If they are logged in is there somewhere I can test that and reduce the cost accordingly.? (Currently I have a custom field asking if they are members and it will reduce the cost properly but we shouldn't have to ask and trust them to answer correctly - can the system set this field and we keep it hidden from the user?)