Answer: Mike's insurance company will pay $360. That is, 90 percent of $400.
Explanation: The insurance company pays 90 percentage of the replacement cost of personal property damaged by fire. Although the actual amount Mike paid for the stove was $350 but now was worth $90 due to the fire incident. The insurable amount that was expected to have been communicated to the insurance company was the current market value and not the actual amount parted with, at first. This is because the insured would be at a loss in case of any eventuality.
So it was expected that Mike would have communicated $400 as the current market value to the insurance company to be the insurable amount.
The insurance company would take possession of the damaged stove which is now worth $90 and sell it to salvage buyer most likely at that price to cushion the loss that was incurred. Also, the company would pay $360 to Mike while he bears the remaining balance, which is $40.