Answer:
$ 661,000
Explanation:
Solution
Given that:
Since the lease meets none of the capital lease categorization criteria ,The lease is an called a lease that is operating and  the asset  will stay in books of lessor
Lease revenue                $1524000
less:
Maintenance        $123000
Depreciation        $740000   $863000
Income before taxes            $661000
Therefore, The amount of expense incurred by Riggs from this lease for the year ended December 31, 2021 is $ 661,000