Payment of Excise Duty

Dear Friends,

      I want to know

At the time of payment of Excise duty,

1) How much amount to be debited to RG 23C p-I, RG 23C p-II & PLA ? Full available amount, or any % thereof.

2) Is there any rule regarding this?

For Example:

  I have to pay Rs. 200

Balance Standing in the credit of

RG 23C p-I : Rs. 60

RG 23C p-II : Rs. 70

PLA  :             Rs. 120

Now explain me How much amount I'll debit to which account for payment of Rs.200.?