Contribution Column very useful when you want to see clearly how you get such nutrients values in the recipe.

By choosing a specific nutrient in the recipe, you can see in thr contribution column first figure, what raw materials in what quantities given this nutrient in the recipe, the second figure in parentheses shows the total amount of this nutrient in the raw material. 

Premix can be created by exrtacting from main recipe and saved as separate recipe and as one raw material for further use.

Open premix allows to open in new window the recipe of premix instead of one raw material.

Premix roll out function allows to expand the full content of premix instead of one raw material a recipe.