Marginal costs. Keep in mind that marginal means on the edge of something, so the cost of producing one more unit would be on the edge. Hope this explanation helps.
One of the main things that the United States <span>learned during the space race was that Russia was a very formidable opponent, and that it was extremely expensive and time-consuming to send things into space--especially humans. </span>
Four score today Shows what the war had done to the civilians and how they can be better and make slavery not win to make the North win.<span />
U must point ur forefinger in the direction of the lines of force
