An individual has three credit cards with debt and different interest rates. Card 1 has $500 of debt and 1.5% monthly interest rate, Card 2 has $750 of debt and 2.0% monthly interest rate, and Card 3 has $1000 of debt and 1.0% monthly interest rate.
If the individual sets aside $500 per month to pay off the debt, how should the $500 be distributed to three cards to minimize the amount of interest?