Percentage Calculation keeping in mind a text feild

Hi,

I want to calculate a percentage of any amount as I have two options i.e. Debit Card and Credit Card.

I want to put a formula which check that If Column A contains "Debit Card / Credit Card" then percentage should be as below,

In case of Debit Card = If amount is less than equal to 2000 then percentage should be 0.75% of a given amount. If amount is greater than 2000 than percentage should be 1% of a given amount.

In case of Credit Card = Percentage should be 1% of a given amount.

Please help me to update the formula to complete the task.

Thanks & regards,

Amit Chand