training should start the  day a person is hired from  the new hire paper work to the introductions of all the departments managers and their expectations ,to what is is required from them and I don't mean the 20 min sales training cource by the sales manger that says sell or your gone .....every week and every deal should have a planned new hire and experienced training plan....if not daily at least  ever other day.......any course  in person or online  both are needed>>>>> NO EXCEPTIONS......  COST WILL PROVE YOUR DECISION is correct (ROI) do in house training as well as outsourcing  ...it's about continual training  and recruiting of new salespeople it never stops.....so train all,  some will  leave but the ones  that stay will be better off and the ones that left proably made you money in the mean  time ,,,,,POINT is we're in the retail business ....train ..train...train.....