Hal and Pat, a married couple filing jointly, had the mortgage debt on their principal residence cancelled in 2021. What is the maximum amount of qualified principal residence debt cancellation that they can exclude from their income?

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.