Hundred-pound bags of alcohol (the solid, industrial variety) are stacked 25 per skid for shipping. The skids are weighed before shipping to check that the bag weights meet the customer specifications. The customer specifications call for 100 4 lb per bag, so the material handler at the stacking operation uses 2500 100 lb as the specification for the skid weight (less the weight of the wooden skid). The customer complains of receiving bags that are underweight. What would be the correct specification for the skid weight, assuming that the bag weights are independent? (The company uses this procedure of checking the skid weights as a quick way of checking the bag weights.)