Find the present value of $600 due in the future under each of these conditions: 10% nominal rate, semiannual compounding, discounted back 4 years. Do not round intermediate calculations. Round your answer to the nearest cent. $ 10% nominal rate, quarterly compounding, discounted back 4 years. Do not round intermediate calculations. Round your answer to the nearest cent. $ 10% nominal rate, monthly compounding, discounted back 1 year. Do not round intermediate calculations. Round your answer to the nearest cent. $ Why do the differences in the PVs occur?