Donna donates stock in Chipper Corporation to the American Red Cross on September 10, 2020. She purchased the stock for $26,250 on December 28, 2019, and it had a fair market value of $37,500 when she made the donation.

a. What is Donna's charitable contribution deduction? The stock is treated as property and Donna's charitable contribution deduction is $

b. Assume instead that the stock had a fair market value of $22,500 (rather than $37,500) when it was donated to the American Red Cross. What is Donna's charitable contribution deduction? $