80 yuan. A dress costs 50 yuan and costs 50 yuan. Sold at 70%, received 100 counterfeit money, and needed to find the buyer 30 yuan 30 yuan. In the whole process, it was always 50+30=80 yuan, losing to 80 yuan. Clothing is the general name of clothes, shoes, bags, toys and ornaments, which appeared in the early stage of the development of human society. Ancient people used all kinds of materials that could be found around them to make rough "clothes" to protect themselves.