Create a file to import goods from CSV to Beatrix

You need to make a CSV work file format to upload this file to the online store. File with a certain sequence of speakers that will correctly import goods to the online store. In order not to have a conflict between unloadings from different suppliers will have to make a column "Supplier", Suppliers several, each of the suppliers has its own file format. I will transfer the data from the vendor files by copying to the CSV work file format. Set up imports. The first time to unload in an inactive folder, the departments myself move. Subsequent imports deactivate goods with the number 0 or not on the list, the new product goes to an inactive folder, this applies only to this supplier (must).
How much will it cost? What time is it? Its not urgent.