Answer: $10,000
Step-by-step explanation:
I know this question looks like a lot but it isn't. It is simply asking how much gain was made in the cash that was exchanged.
Now we see that the company acquired the building for $50,000 but acquired the mortgage on it of $40,000 and hence paid off the balance of $10,000 to Al.
So the gain was,
Cash in the amount transferred = (fair market value - mortgage)
= $50,000) - $40,000
= $10,000
$10,000 is the gain that Al should recognize as a result of this transaction.