base = Base, variable = Variable etc.
Employment Type = employment_type, Branch = branch etc.
Payment Days = payment_days, Leave without pay = leave_without_pay etc.
BS = Basic Salary etc.
gross_pay and annual_taxable_earning can also be used.
base
Condition: base < 10000
Formula: base * .2
BS
Condition: BS > 2000
Formula: BS * .1
employment_type
Condition: employment_type=="Intern"
Amount: 1000
annual_taxable_earning
Condition: annual_taxable_earning > 20000000
Formula: annual_taxable_earning * 0.10