business casual

So the past 2 1/2 years in ministry has taught me a lot, grown me a lot, and given me a lot in most all areas of my life..except a business casual wardrobe. We are headed to Colorado in 1 week, and on the packing list is some "business casual" clothing for when we interact and meet the President of Campus Crusade and all those sorts of people. Business casual clothing is precisely why I went in to ministry (among many other reasons of course). But the fact is...I've never needed it. I'm just casual, not business. I like to dress up for events and own a handful of dresses and heels, but I feel like that is TOO dressy. Between my clothes and my best friend Kelli's clothes (who is also joining staff) I think we can muster up a few outfits that will work. I did however buy the Old Navy Groupon the other day and today went and bought a pair of navy blue capris that I can dress up or down. I am excited about the purchase but realized I still don't have tops that are not cotton. And apparently cotton is not "business casual" (the two words that are driving me NUTS!).AGH!