When a firm is in a constant-cost industry, a decrease in demand will result in economic (losses or profits) . this will cause (exit from or entry into) the industry, resulting in (an increase or a decrease) in supply over time. this long-run adjustment will eventually cause the price level to (increase, decrease or remain constant) so that it eventually (return to the level it was, occur at a higher level than or occurs at a lower level than) before the demand shift. there will be firms (the same number of, more or fewer) in the industry. the long-run industry supply curve will be (horixontal, downward shifiting or upward shifting).