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In 1<= year <3,
Gratuity =   [ Basic Salary x 7 days x No. of years of service ] / 30
In 3<= year <5,
Gratuity =   [ Basic Salary x 14 days x No. of years of service ] / 30
In year> =5,
Gratuity  =  [ Basic Salary x 21 days x No. of years of service ] / 30 

Serkan AKKAVAK
Computer Engineer BSc
SAP Department Deputy Manager
Contact : serkurumsal@yandex.com