@Aarti
Dont worry if he doesnt Agree. Your CTC still is at Rs 15,000/- and for whatever reasons you might want to use your payslip, it stands at Rs 15,000/-. Gratuity is 15 days salary for every year completed but on eligibility of completion of 5 yrs of service with the organization. if that is included in CTC then your net pay in hand reduces even further. To comment on Rs 12,896/- the break-up of your ctc would be required.
Did you ask for an quicker appraisal say on end of probation term???...maybe there is an option there if you feel you are worth every penny the company spends on you. If that doesnt happen then too dont worry. Remember Experience is always valued over and above all other things. Gain the Experience and handle your job sucessfully and keep inventing new ideas which produce results both ends employer & employee...you will get what you want either here or somewhere else sooner than later.......rgrds SS