Hello dear student, 

As per your query. As you said you have scored 420 marks in NEET and you need to take admission in sapthagiri medical college under management quota. So yes you have enough good marks and you can apply for that . While you want to know about the fees structure so it is as follows

• For first year it is 109,800 
• While for the next year's it is 97,350

I hope this was helpful

Best regards Apoorva