Package goods are used as metaphors for trendy fashions in new commercials from Target Stores. Images of Tums alternate with a woman dancing to Canned Heat's "Let's Work Together" in a spot for two-pieces. Other pairings: LifeSavers and surf shorts, Bounce and stretch pants, Tide and flood pants. Peterson Milla Hooks, Minneapolis, handles. Copywriter: Amie Valentine. Art director: Dave Peterson. Target, however, hasn't abandoned its "Sign of the Times" commercial look; a summer version will feature a bull's-eye swimming pool and red grass.