How much would it cost for an inside detail of my car?

Just recently bought a Chevy Impala, car was sitting for a while like 2 years or so, it has a old smell in it, stains here an there, nothing crazy though. It just really smells, kinda dusty with crumbs betweens seats.. i just would like to know average cost to detail the inside completely?? car has cloth interior (if it helps)... Thanks