Hello fellows I'm working on a project with a  very large database,and i have to to predict sales (time series) for each custommer (about 200 000) for each product (about 500), based on historical sales data as well as some kind of auxiliary variables/series , lets call them events, wich can be categoriaca/flag and continous too. Because it's a huge work, and it will be very time consummer, i  th…