Often in manufacturing with catch weights, indirect costs are on the catch weight unit, such as a carton fee or per head fee in animal processing. Unfortunately the costing sheet doesn't support catch weights. For example the output unit based has subtypes for quantity, weight or volume but not catch weight. For catch weight items the quantity is usually the weight. So as an improvement, for catch weight items the quantity should refer the catch weight quantity or an additional subtype of catch weight should be available.