How Absence calculation card works for saudi payroll ?

We created an Annual vacation plan with Final Disbursement enabled and Rate Definition with Saudi Hire Date Anniversary Excess Leave, Employee had 20.75 annual accrual balance with 2 days of absence applied during the termination month.

Basic Salary = 16500

Bonus = 2000

But Gross salary is calculated as 17230 where (2 days of absence is deducted with one day 634.61 ) we were expecting accrual of 20.75 with daily rate will be calculated and paid at Net pay but saudi legisation payroll calculates differently .

Can some explain how Net salary , Gross and Absence is calculated?

Attached document has the statement of earning screen shot