Machine learning methods and systems for managing retail store processes involving cashier-less transactions

This Application is a continuation of U.S. patent application Ser. No. 15/859,627, filed on Dec. 31, 2017, entitled “DEVICES FOR TRACKING RETAIL INTERACTIONS WITH GOODS AND ASSOCIATION TO USER ACCOUNTS FOR CASHIER-LESS TRANSACTIONS,” which is a continuation of U.S. patent application Ser. No. 15/376,636, filed on Dec. 12, 2016 (now U.S. Pat. No. 9,911,290, issued on Mar. 6, 2018), entitled “WIRELESS CODED COMMUNICATION (WCC) DEVICES FOR TRACKING RETAIL INTERACTIONS WITH GOODS AND ASSOCIATION TO USER ACCOUNTS,” which is a continuation-in-part of U.S. patent application Ser. No. 15/217,972, filed on Jul. 23, 2016, entitled “WIRELESS CODED COMMUNICATION (WCC) DEVICES WITH ENERGY HARVESTING POWER SOURCES TRIGGERED WITH INCIDENTAL MECHANICAL FORCES,” which claims priority from U.S. Provisional Patent Application No. 62/197,003, filed on Jul. 25, 2015, and entitled “WIRELESS CODED COMMUNICATION (WCC) DEVICES AND METHODS, SYSTEMS, DEVICES USING OR IMPLEMENTING WCC DEVICES,” which are incorpor...