Dear Student,
The fees of b.com and BBA is different for differet colleges.
It Depends on your choice of college.It also depends if you want to avail hostel facility or not. The basic fee structure of BBA OR B.COM for Government colleges starts from 15000-20000 per semester.  The fee structure for BBA AND B.COM starts from 55000-60000 per semester for Private colleges.
All the best. I hope this was helpful to you.