Concept annulation et constatation du stock

Db flwl dyal l3am kaykon 3ndna stock initial, et f lkhr d l3am kaykon 3ndna stock final o lfr9 binathom kaytssma variation de stock. Mais fach kaydkhl l3am jdid kan2anuliw dak stock initial lli kan3ndna f lwl d l3am et kan constatiw le stock final lli kan3ndna f lkhr d l3am. ( stock lli kan3ndna f lwl d l3am makayb9ach, et hadak stock final lli kan3ndna f lkhr d l3am kaywlli howa stock initial lli kanbdaw bih l3am jdid).