Complex sentence: As a child star, Coogan earned an estimated $3 to $4 million, but the entire amount was spent by his mother and stepfather, Arthur Bernstein, on fur coats, diamonds and other jewelry, and expensive cars.
Split into simpler sentences: As a child star, Coogan earned an estimated $3 to $4 million. However, Coogan found that the entire amount had been spent by his mother and stepfather, Arthur Bernstein, on fur coats, diamonds and other jewelry, and expensive cars.