IF formulas

Can someone help me with how to set up IF when I am trying to calculate no rebate if revenue is $99,000 or less, a 7.5% rebate back to $1 if revenue is between $100,000 and $200,000, then if revenue is more than $200,000 add a 10% rebate on the amount greater than $200,000 up to $300,000, and a 12% rebate on any revenue above $300,000.

Example,

if revenue is $150,000, then rebate is 7.5% *$150,000

if revenue is $250,000 then rebate is 7.5% * $200,000 plus 10% * $50,000

if revenue is $350,000, then rebate is 7.5% *$200,000 plus 10% * $100,000 plus 12% * $50,000