A U.S. corporation includes machinery on its 12/31/2018 balance sheet at its book value of $1,000,000 (cost of $1,500,000, and accumulated depreciation of $500,000). This indicates The machinery is worth $1,000,000 at the balance sheet date O $500,000 of depreciation expense was recognized in 2018 O The undepreciated cost of the machinery is $1,000,000 at the balance sheet date All of the above are correct