STYLETHREAD -- LET'S TALK SHOP!

if you do a suit i would accessorize with a great bag and killer shoes. 

should you opt for something other than a suit another suggestion would be a black button down and black pants. it looks really sharp when you tuck the shirt in and pair it with a great belt (i used a gray patent leather belt). i used this look for an interview with a luxury women's boutique and got the job so i'm thinking it worked.  

another option is to do striped pants and a striped button down. i like this look b/c it's crisp, and professional, but the mixed stripes add a fashiony touch.
 
either way i would definitely go with a great bag and great shoes. while i'm not necessarily a believer in a bag makes the outfit, i think in these situations it can convey a knowledge of fashion without being too in-your-face.  hth!

Where are those tops from FP? They are super cute!!

I would add a punch or color, detail, in beautiful (expensive) fabric for your blouse under the suit, a wide patent belt over the jacket, interesting, but professional bag, and closed toe pumps (with detail, perhaps, but you want them to focus on you and not your outfit, so I would focus on the pretty blouse under your jacket and the belt - the most detail I would go with with the shoes is perhaps a platform -- you will want communicate you are current on trends since it's a buyer position (I'm guessing))

I would focus on quality, detail, and trend.