regarding weapons

Hello all. I wanted to ask does the number of faces of the secondary weapon or the primary weapon, when they are not in use, add to the total count of faces for the unit that is present on the battlefield. For example if i have an archer with 700 faces with a bow (primary) of 100 faces and a sword (secondary) 80 faces, do i add this up all the time or only when the model uses the respective weapon? The reason i ask this is that i dont want to exceed 850 faces for my models and i need to know, do i add up the weapons that are not in use?