Five investors are repaid, each with their initial investment increased by p% plus a fixed ‘thank you’ bonus of $q. The woman who invested $20000 is repaid double her investment and the man who invested $7500 is repaid triple his investment. Find the total amount that the five people invested, given that the mean amount repaid to them was $33000.

Do you think the method of repayment is fair? Give a reason for your answer.