folks, can help me solve this puzzle?
1. please correct me if i'm mistaken, and i believe these ERP gantries can pick up the IU's identification and then charging the unit via cashcard.
2. and why are we using credit cards to charge now?
3. which leads me to the last question: why do we still need cashcards in the first place if they can bill us at the end of the month right from the beginning?
It's not really a puzzle. The system was first conceived on a cash card. Then they realize people find it troublesome to keep topping up cash card. So they implemented the credit card module into the system. So now you can use a credit card in addition to a cash card.
Hope that clears up