Fudge: Now that I can input the numbers I see that you have formulas in there! AWESOME - thanks! (answers my earlier question) EDIT - have any of you ordered these online and had them delivered to your home? If so, from where? EDIT EDIT - just ordered two from Max BMW. Total with shipping is $24.55. Compare this with my local BMW shop at $21.40 for two. However, they would need to order them as well (same time as Max), but I would also have over an hour drive total and about $15 in gas alone going local. Not to mention again over an hour of my time on a Saturday.