How can i calculate ACCRUAL_RATE

Dear friends,
How can i calculate the ACCRUAL_RATE ,
I am using the PTO_SIMPLE_BALANCE_MULTIPLIER .
Yearly Leave Entitlement for varioius Grades are Grade A = 20 ,
Grade B=25 and Grade C=30.
Frequincy = M
Multiplier =1
i am using the monthly accrual
Can i make ACCRUAL_RATE like this YEARLY_ENTITLEMENT/12
thanks
zamora

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I think that approaching this from the perspective of increasing temporary space and log space is not the best way.
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