Complex sentence: The next day, Dwayne leaves a copy of the video at the local post office, where the postmaster has filled out an application for Dwayne to receive the six-figure reward offered for providing evidence of violence against a postal worker.
Split into simpler sentences: The next day, Dwayne drops off a copy of the video at the local post office. The postmaster has already filled out an application for Dwayne to receive the standard six-figure reward for reporting a crimesolving tip for any violence against a postal worker.