In 2020, Jessie's business-use equipment was damaged in a casualty. The equipment had a fair market value of $100,000 and an adjusted basis of $70,000 before the casualty. After the casualty, the equipment was worth $60,000 Jessie's received no insurance proceeds. What is the amount of Jessie's casualty loss deduction or her casualty gain in 2020? Enter losses as a negative number and gains as a positive number.