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GODKNOWS 发表于 2012-9-29 16:26 250ml+40ml=290ml. $25/290=$0.0862.../ml. 0.086...*40ml=$3.4482...
GODKNOWS 发表于 2012-9-29 16:33 By the way, you are making a second hand sales. Then the price should be $3.4482...*75%=$2.59. Am ...
TA还没有介绍自己。