Otto operates a bakery and is on the cash method and calendar year for 2017. This year one of Otto's ovens caught fire and was partially destroyed. Otto bought it a few years ago for $20,000 and claimed depreciation of $12,000 up to the fire. Otto was charged $4,400 for repairs to the oven but the insurance company paid Otto $1,500 for the damage. What is Otto's casualty loss deduction?