Which of the following statements is true of the methods for allocating joint costs?
◦ Constant gross-margin percentage method results in same joint production cost per unit for all products.
◦ Estimated net realizable value method results in same gross margin percentage for all products.
◦ Present value allocation method is the least preferred method due to its complex calculations.
◦ Sales value at split-off method uses the sales value of the entire production of the accounting period to allocate costs.