Millions spent online during election campaign

Debates, rallies and walkabouts got much of the attention in the election campaign.
But a big part of the battle unfolded on the internet, with millions of dollars spent from all sides of the political spectrum.
In Depth data journalist Farah Hancock has been crunching the numbers on what was spent in the three months leading up to election day.
Hancock spoke to Ingrid Hipkiss.