Tender for The requester needs to develop the following features: 1) new load system, allowing a new catalog to be uploaded, can be chosen between keeping everything previously loaded or deleting those products that are not found in the catalog (necessary for the cleans of obsolete products). 2) enhances in the analyze catalog tracker, so that they automatically delete duplicate products (in article and price code) during the load process, and so avoid the suppliers or managers to have it resolved manually. 3) massive load system of users per entity, to REPITALize new users when re-editing a new entity to joint hires of csu. 4) Mass load system for entity cost centers, to implement high testosterone of new cost centers, when it integrates a new entity to the joint hires of the csuuc.