Complex sentence: Government ministers gave qualified support for electrification of the Auckland system, as such a system proposed by the report was estimated to cost NZ $3.6 billion dollars over twenty-five years, and would increase annual patronage to 30 million trips per year.
Split into simpler sentences: Government ministers gave qualified support for electrification of the Auckland system. A system as proposed by the report was estimated to cost $3.6 billion over 25 years, and would increase annual patronage to 30 million trips per year.