Hi Rabi,
Use period balance time type for quota generation and pass constant 2.5 value to time type through pcr then QUOTA function will update the quota in the absence quota type.(this pcr if you require then tell me i will attached you).
Now after the QUOTA function write the below mention pcr with using of P2006 function. After the P2006 function line put CUMBT function again. Let me explain you about the pcr and other things which is required to create in your system.
PH and PI both are date type.PH is for joining date and PI is your cross checking date i.e. 01.04.2012.(check the previous pcr)
ZELCF is constant and it's value is 60 and stored in table T511k. same ZELC1 is another constant and it's value is 300. 9MAY is period time type which you will be used in base entitlement of quota and it will come to generation rule under base entitlement tab.(don't required seq 2).
Apply same like 1st picture detials instead of ZELCF constant use of ZELC1.
Check and tell me.
Regards,
Sankarsan