4. Mr. Jaffer was working in Al Maha Production LLC as a Marketing Manager from 11th August 2006 till 31st March 2018. At the beginning of his carrier he was getting a gross salary and basic salary of 600 pm and 4800 pa. At the time of retirement, he was drawing a salary of OMR 11,400 pa as his gross salary. The allowances include HRA OMR 150; Telephone OMR 30; Transport Allowance OMR 20; Canteen Allowances OMR 60. You are required to calculate the amount of Gratuity of Mr. Jaffer