https://www.sixsigmacouncil.org/six-sigma-certification/invoice/inv-4825/ 2019-03-05T18:19:00+00:00 https://www.sixsigmacouncil.org/six-sigma-certification/invoice/inv-5333/ 2020-02-28T18:13:27+00:00 https://www.sixsigmacouncil.org/six-sigma-certification/invoice/inv-5430/ 2020-05-21T05:38:49+00:00 https://www.sixsigmacouncil.org/six-sigma-certification/invoice/inv-5722/ 2020-11-02T08:32:41+00:00 https://www.sixsigmacouncil.org/six-sigma-certification/invoice/inv-5802/ 2021-01-23T21:28:55+00:00 https://www.sixsigmacouncil.org/six-sigma-certification/invoice/inv-5970/ 2021-05-03T02:33:25+00:00