Christina, who is single, purchased 560 shares of Apple Incorporated stock several years ago for $21,840. During her year-end tax planning, she decided to sell 280 shares of Apple for $9,520 on December 30 . However, two weeks later, Apple introduced its latest IPhone, and she decided that she should buy the 280 shares (cost of $10,080) of Apple back before prices skyrocket. Note: Leave no answers blank. Enter zero if applicable. What is Christina's deductible loss on the sale of 280 shares? What is her basis in the 280 new shares