Complex sentence: In 1913 Whiting began his career as a song plugger for Jerome H. Remick publishing company, within a year, he was the manager of the Detroit office, being paid US $25 per week.
Split into simpler sentences: In 1913 Whiting began his career as a song plugger for Jerome H. Remick publishing company. Within a year he was the manager of the Detroit office, being paid US $25 per week.