disposal of a depreciable asset

My partnership owns and rents a house. The house is rented and is used by the partners part time. Rental factor is .6437

A refrigerator which has been being depreciated died after depreciating to about half its cost (cost $815, depreciation until 11/15/2023 is $533). When TT calculates the amount of loss, it shows $73 . Why would the loss not be ($815-$533) x .6437 =$181.50?? I can't find the formula that TT uses to calculate it.