Cut sliced bacon in half. Wrap 1/2 slice bacon around pineapple chunk and secure with toothpick. Place in shallow baking pan, 9 X 9 inches. Bake 10 minutes at 400 degrees and drain any fat. Mix Miracle Whip, chili sauce and brown sugar together in bowl. Pour over pineapple/bacon. Bake at 400 degrees for anothere 20 minutes. Serve -- these are good hot or cold!