DEAR MARY: My husband and I own a small business, and we are looking for a credit card that offers reward air miles. Our plan is to pay it off each month but collect miles for travel to buy goods for our business. One of our sales reps told us that many small businesses pay for goods at gift shows with their credit card and use those miles to pay for trips to the next trade show. Do you know of a site where we can find a credit card for this purpose? Thank you so much. Your column is filled with wisdom and inspiration, and I really enjoy it. —Toni C., Wash.