1.51g of oily skin needs 11g of dried skin and 2g of oil, so the cost is 8.6 * 1.112+5 * 1.15 = 1.1172+1.25 = 1.2672 yuan. 2. The cost of live crucian carp is 6.84 yuan, and the cost of oil is 6.8*1.1=1.68 yuan, so the cost is. 1.5*11+1.3*11.5+5*1.5=11.15 Yuan, and the cooked chicken breast is 1.4*1.7=1.28kg=281g, so the cost per 51g is (18-11.15)/281 *51=1.223 Yuan 4.126 * 1. 124.74*1.23=28.6912, 124.74*1.54=63.3596, 124.74*1.11=13.72145. The cost of buying meat is 75*5=375 yuan. After removing bones and sundries, there are 57.5 kg, and 511g is one kg, so the cost is.