Response:
200 pairs of pants and 400 pairs of pants
Clarification:
According to the prompt, the company began its production with 500 pairs of pants and 700 shirts
If the company opts to increase the shirt production by 100 units, the opportunity cost amounts to 200 pairs of pants
Should the shirt production rise by 500 units, the opportunity cost would then be 400 pairs of pants
Hence, based on the described scenario, the initial response is 200 pairs of pants, while the subsequent one is 400 pairs of pants