For example, one of my settlements has 18 settlers and produces 55 food (according to the workshop HUD). However, the food bar in the UI is not full and some of my plots have the "insufficient food" warning floating above them. I assume that this is because of the dynamic needs system which gives plots negative production values of food, water, defense, etc. However these negatives don't seem to be reflected in the workshop HUD, so is there a way I can see how much food I actually need to satisfy the needs of the settlement?