i'm not sure what I'm doing here to keep getting this answer wrong and if I can't get it right, I can't get the other ones right either so I need help on the progression steps.

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. $8,100 in 14 years at 7 percent? Note: Do not round intermediate calculations, Round your final onswer to 2 decimol places. b. $16,800 in 9 years at 8 percent? Note: Do not round intermediate calculotions. Round your final answer to 2 decimal places. c. $26,500 in 20 years at 6 percent? Note: Do not round intermediote colculotions. Round your final answer to 2 decimal places. Prentet waice of $1,Vy