Is it obligatory to inform the employer about the purchasing manager's price manipulation, knowing that he will not fire her, or should the value of the increases be gradually deducted from her?

A Muslim cannot remain silent about evil if they are able to change it, either by hand, or if not, then by tongue, or if not, then by heart, which is the weakest of faith. If the woman who consumes unlawful things is not deterred by advice, then it is obligatory to inform the owner of the money as a fulfillment of the trust and the necessary advice; otherwise, the questioner exposes herself to accountability before God. As for the issue of deducting from her pay, it is not the right of the questioner. Rather, she should first advise the woman, then inform the owner of the money so that he can undertake the investigation and reclaim his right.