Answer:
The amount of $370,000 will be the business basis in the assets.
Explanation:
The tax deferred exchange is the 1031 exchange which allows the business to sell one or more appreciated assets mostly the rental or the real estate and defer the payment in the capital gain taxes through acquiring one or more replacement properties.
So, Dennis contribute the business asset for the tax deferred exchange whose market value is $370,000 but unfortunately, the exchange did not qualify for the same. Therefore, the business's basis in the assets which is received from Dennis amounts to $370,000 because the exchange is fully taxable transaction so full fair market value will be received.