Christina, who is single, purchased 160 shares of Apple Inc. stock several years ago for $9,440. During her year-end tax planning, she decided to sell 80 shares of Apple for $4,320 on December 30. However, two weeks later, Apple introduced its latest iPhone, and she decided that she should buy the 80 shares (cost of $4,480) of Apple back before prices skyrocket. Leave no answers blank. Enter zero if applicable.) Problem 7-53 Part-a a. What is Christina's deductible loss on the sale of 80 shares? What is her basis in the 80 new shares? Deductible loss Basis