Among them, the unit consumption of imported materials refers to the quantity of imported materials needed to produce each export finished product. Your specific question is how many imported fabrics are needed on average to produce each garment. This does not include the lost part, that is to say, the quantity of materials referred to in the unit consumption has all been converted into finished products.
Loss rate refers to the percentage of reasonable loss in the process of processing and production to the total consumption of imported materials. For the lost part, the customs will also collect some taxes according to its residual value. The loss exceeds the unit consumption.
Let's give an example. For example, if you import a batch of 100 m cloth and export all 30 pieces of clothes, it is estimated that you will lose100 m cloth due to the objective constraints of technology and processing. Then the unit consumption of each garment is 3 meters, and the loss rate is 10%.
This example is definitely very different from the reality, just for the convenience of calculation and has no practical reference significance.
Finally, I will give you two useful formulas, please focus on understanding their practical significance:
The total consumption of a single imported material = the unit consumption of the material * the number of finished products exported+the total consumption of the imported material * the loss rate of the material.
The total import volume of a single imported material = the total consumption of the imported material+the remaining amount of the material after processing.