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Fee for express delivery under 10 kilograms is calculated like this:
Packages under 0.5 kilogram costs 240 RMB, while adding 48 RMB for every extra 0.5 kilogram.
Your payment for the package is, to be exact: 240+48X2X4=624 RMB.

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　　Freight calculation for express delivery under 10 kg,
　　Initial cost (0.5 kg): RMB 240 yuan， 48 yuan per additional 0.5kg, that is, 240+48X2X4=624yuan . 供参考

Express freight under 10 kg is calculated as follows: The original 0.5KG is 240RMB. If we add 0.5KG parcel , it will be added 48RMB. That is ,240+48X2X4=624

The express cost calculation for less than 10 KG as below:
The start weight is 0.5KG, and the cost is 240 Yuan, then 48 Yuan for every added 0.5KG, that is: 240+48X2X4=624 Yuan.