How can i calculate progressive tax. For example if all income up to 200$ is
exempted from any tax and :
$ 201-500 taxed 10%
501-1000 taxed 15%
1001 and above 20%

In this case for example if the salary is 1200 then it is subject to three
taxes i.e 10% upto the icome of 500 , 15% for (501-1000) aand 20% for the
remaining 200 dollar .

Apprciate your help