Maybe business casual means different things in different industries/companies. Khakis would not fly in my biz casual office. If you are in sales I would step it up a bit. Business casual to me means you don't have to wear a suit, but I would recommend nice work pants (I like Banana, Ann Taylor, Loft, though I'm sure some would find those hideous

- I'm petite and they do small framed shorter women really well). And pair the pants (or skirt) with a button up blouse or thin material sweater, or cropped suit jacket/blazer (but not a full on suit.
A cute dress is nice too.