The Lumber Cost+ column indicates the actual cost of lumber given the fact that a worker unit must construct the building and while they’re doing that they could have been harvesting lumber. Table 1: Food buildings with modified lumber cost Building This table illustrates the “actual” real cost of each race’s food supplying building. Like any other resource in an RTS game, food costs you something to supply and that cost can be calculated.
Food usage does effect the unit’s final cost though since food supply is not free. In most cases the most relevant data is simply the unit’s listed gold and lumber cost. When looking at how much a unit “costs” in Warcraft 3, few people consider the costs associated with unit food supply into the cost of the unit.