right now i have an employee who is getting 500 dollars overtime when he works 40 hours and his basic salary is 3500 dollars, i need to have an equation to calculate the amount of dollars when he work any other amount of hours different salary or with basic salary 4000 dollars. Thanks
You are leaving out a few details but here is what I came up with for what I think you are looking for.
=IF(C2>40,A2+B2*(C2-40),A2)