How do you calculate the return in cashback?

How do you calculate the return in cashback?

Cashback* is calculated as a percentage of the borrowing cost: 4% for the first 10 fully repaid loans, 8% for the next 10 loans, and 12% for any loans thereafter. Only loans repaid according to the original terms of the agreement are eligible for cashback. For more details, please refer to the Cashback Program section of our Terms and Conditions.