Gross Salary - PT Calculation

Dear Sir,
1) Follwoing coponents are shown in CTC/ offer letter
1) LTA - Paid Annually
2) Medical Allowance - Paid quarterly
3) Ad hoc allowance - Paid quarterly
Can we take these components into consideration while fixing the PT slab rate / Are they form part of gross salary how to decide PT slab rate.
Because in some months Gross salary will be less but in some months gross salary will be high due to disbursement of these allowances /benefits
2) What is gross salary for PT Calculation?????

Gross salary is know as total earning and PT is applicable on earnings. Hence, whatever amount earn in the month, PT is applicable on that other than bonus.

Yes Navneet is right. PT calculates on gross salary but bonus should not included.
Suppose your gross salary is 10000/- and you get bonus also on same period. you have to pay pt on 10000/-
Sanjeev