Hey,
Bachelor of Commerce(B.Com) is a three-year long undergraduate programme that aims to impart information about the fields related to finance,management etcetra. Generally,the eligibility criteria demands the student to score minimum 50 percent in the 12th boards from recognized board having Mathematics and English as the core subjects.
With percentage between 41 and 45 ,there are less chances for you to get even good private college. However,there are private colleges that accept donations and the amount vary for different institutions. You can enquire about the same through the administrative block of the respective colleges.
Hope this helps.
Good luck.

Hello! Hope you are doing good

The required percentage and the eligibility depends on the college that you are choosing to register in. The donations asked also depends on the college that you're applying in. It would be good if you could specify the college that you're referring to.

Hope it helps. All the best