What are the 3 methods of allocating joint costs?

1. Sales value at split-off method: The value of the product before split-off is allocated to each main and by-product. The most simple method. 2. The physical measurement method: Uses the physical units of production to allocate costs. This method is more applicable to products measured per kg, liters etc. But there is no common unit point for weighting. Hence, it is a problem when products have a much different value. 3. Constant gross-margin percentage NRV method: Allocates joint costs so that the overall gross-margin percentage is identical for each individual product. By far the most difficult method.