On the day he dropped out of the race, Cruz had won 565 delegates. He and his PACs had spent $107.5 million on the campaign. That works out to $190,265 of spending on every delegate.
After the Indiana primary, Trump had racked up 1,041 delegates while spending $49 million on the campaign (this includes $1.2 million from a PAC). That’s a spend of $47,070 per delegate won. Trump gets all the media attention he can handle, while Cruz had to buy most of his air time.