corp formation question

Karen, in forming a new corporation, transfers land to the corporation in exchange for 100 percent of the stock of the corporation. Karen's basis in the land is $280,000, and the corporation assumes a liability on the property in the amount of $300,000. The stock received by Karen has a fair market value of $550,000. If an amount is zero, enter " 0 ". a. What is the amount of gain or loss that must be recognized by Karen on this transfer? x Feedback Check My Woek b. What is the amount of Karen's basis in the corporation's stock? c. What is the amount of the corporation's basis in the land