Phineas invests $2,000 at a nominal annual interest rate of 4% compounded semi annually. Ferb invests $2,500 at an effective annual rate of 3%. Candace can earn an effective annual interest rate of 6%. How much should Candace invest so that there is a point in time in the future where all 3 have the exact same dollar amount at the exact same time? Hint: First find when Phineas and Ferb have the same balance.