Complex sentence: He had earned an estimated US $55 million in the previous 12 months, however it was later deemed that the calculator was malfunctioning due to the uncertainty of 0/0 and Bieber actually owed $30 million to the Kids Traumatized by Justin Bieber Foundation.
Split into simpler sentences: He had earned an estimated US $55 million in the previous 12 months. However it was later deemed that the calculator was malfunctioning due to the uncertainty of 0/0 and Bieber actually owed $30 million to the Kids Traumatized by Justin Bieber Foundation.