My dear friend it is not possible to both at the same time both are degree and one is a bachelor degree and another is a master degree you can't do at the same time. If you want to do MBA then you need to eligible for it and for eligibility you at least need one bachelor degree and you may do B.com if you are really interested in it. that way you do both in 5 years. 3 years for B.com and 2 years for an MBA.

All the best.