+ $8.60 per kg* thereafter.
*based on volumetric weight @ or actual weight whichever is higher, subject to a minimum charge of 0.5kg#
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actual weight 就是实际重量了
volumetric weight就是按体积估计出的重量。这个vpost也有解释:
@ As per freight industry practice, chargeable weight will be calculated based on volumetric weight or actual weight whichever is higher. Volumetric weight is calculated by (Length X Breadth X Height)/366 where the dimensions are in inches; or (Length X Breadth X Height)/6000 where the dimensions are in centimeters.