In fact, this problem is not difficult to understand. The key is to understand the meaning of the problem.
First of all, there are 100+8= 108 pieces of clothes.
100 is 20% off, that is, the price is 600×0.8=480 yuan, and the profit is 25%. This profit is relative to the purchase price.
So the purchase price we got at this time is 480/( 1+25%)=384 yuan.
At this time, the remaining 8 pieces are "re-discounted" 15%, which is ambiguous again, thus resulting in a result of 2 minutes, which can be understood as a 20% discount on the original price, or as another time, that is, on the basis of a 20% discount. Tracing back to the source, it is that the topic is not rigorous, not that you don't understand it well.
As for the result, I won't go into details. Your answer is already there. Don't take this topic too seriously. The inaccuracy of the questioner wastes your time.