Basically im looking to bulk up (upperbody) and lose some weight (mainly my stomach).

Problem i have is i don't have time to go to the gym due to my job. I have a set of dumbbells in my house so this is all i can use. Don't have room to buy a bench or anything.

What do you suggest is the best way i can bulk up? i.e exercises with dumbbells only

Not great with dietry stuff, so what type of food should i be eating and how often?

Any help is greatly appreciated.