Answer:
This is a gain in exchange of $11,000
Step-by-step explanation:
At the point of exchange
Net book value was $30,000 ($115,000 - $85,000)
Exchanged with a fair value of another asset $91,000
But payment made was $50,000
Exchange gain is $41,000 minus NBV of old asset ($30,000)
Total gain is $11,000