Complex sentence: The single was certified platinum by the Recording Industry Association of America, representing two million units shipped to stores with Jett's "I Love Rock' n' Roll" album reaching number two on the "Billboard" 200.
Split into simpler sentences: The single was certified platinum by the Recording Industry Association of America, representing two million units shipped to stores. This success propelled Jett's "I Love Rock' n' Roll" album to number two on the "Billboard" 200.