The material ratio is usually drawn up. For example, the part material is 2 kg, and the finished product 1 kg. The steel price is above 500 yuan. Every kilogram of 0.5 yuan's materials went up. In addition, reduce 1 kg of garbage at half price. If there are no tons, 5,000 will rise to 5,500. Product price adjustment: 0.5*2-0.25* 1=0.75. This is the worst conversion rule for the support department. Even foamed iron is included.
Usually, the price will be adjusted according to the proportion of each price.