I need to hook up an old (large) speaker to my Dell laptop. The person said I need the following cable: 1/8” with 2 RCAs (1 red/1 white) Do you have this cable?

I believe they have those cables.. check it online before you go down to the store

Yes you need RCA cables red and white but it sounds to me that you need a 3.5 mm adapter if you're using your headsets port to plug in the lights speakers

I'm almost sure they do. I'd look online or call for an inventory check first.

Yes they have rca cables