how much fee of complete bcom in du.if I take coaching for ca course how much costly it .and how much accommodation expenses.plz.

The fees in DU is not really much. It takes approx 30K for your entire course duration. Also the fees varies in courses and in colleges.

Yes you can go with CA along with Bcom regular. You will have to check with the coaching for fees for CA preparation as it also depends upon the location it is located at.
Hope this helps.

Good Luck.