How can I help you today ?   I want to sign up for some funds units . How do I go about it ?   Have you got some ID and your cash card ?   Yes . I've already got a fund account with you too .   How many more fund units would you like to purchase today ?   I'm not quite sure . You see , I already have more than 5,000 RIB in my cash card , but I really don't know how much I should get .   The usual minimum purchase is 5,000 RIB . 