What is the ruling on money earned from a job salary in which sufficient effort was not expended due to work circumstances, and how can one expiate it if it is unlawful?

You do not bear the sin of the high prices of medicines and everyone's rejection of them unless you were negligent in advising the institution about them.

As for the real mistake, it is your full-time contract with the company, because you signed a contract with the hospital to work in the morning, and this time now belongs to the hospital and it is not permissible to contract for it with another party. Furthermore, you did not fulfill the agreed-upon full-time commitment to the company.

Therefore, you are not entitled to any of the company's salary except for your actual work, and you must return the excess. It is not necessary to confess your mistake to the manager or sell your house, but rather you must return what you took unjustly. Your repentance will not be complete without that, and you must take precautions to ensure your acquittal. If you inform the owner of the institution and they absolve you, that is sufficient.