Self.Count = function(itemid, container)
    if(container)then -- count specific container
        return Container.GetByName(container):CountItemsOfID(itemid) or 0
    end

    local value = 0
    local slots = {Self.Head, Self.Armor, Self.Legs, Self.Feet, Self.Amulet, Self.Weapon, Self.Ring, Self.Shield, Self.Ammo}

    for i = 1, #slots do -- count slots
        local slot = slots[i]()
        if(slot.id == itemid)then
            value = value + math.max(slot.count, 1)
        end
    end

    if(container == nil)then -- count everything
        local cont = Container.GetFirst()
        while (cont:isOpen()) do
            value = value + cont:CountItemsOfID(itemid)
            cont = cont:GetNext()
        end
    end

    return value
end