What is the present value of the following? Use Appendix B as an approximate answer, but calculate your final answer using the formula and financial calculator methods.

a. $7,800 in 6 years at 10 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)

b. $16,500 in 3 years at 7 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)

c. $25,700 in 9 years at 8 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)