Green Apron, a C Corporation, owned food processing equipment (adjusted basis of $50,000; FMV before the fire was $70,000) that was used exclusively in the companys meal delivery business.

Assume that the equipment was partially destroyed in a fire in 2018 (FMV after fire = $40,000), and Green Apron received insurance proceeds of $10,000. What is the amount of Green Aprons casualty gain or loss? (enter loss as negative number)