I would like to buy 1Kg of Lactose to test.Could you please send me the proforma invoice to my e-mail address, ?FYI,Attn:Sung-Guk LeeBioneer Corporation.8-11, Munpyeongsero, Daedeok-gu, Daejeon Korea.Zip code 343022-42-930-8535I look forward to your answer.Best regards,Sung-Guk.