Senator WONG (South Australia—Leader of the Opposition in the Senate) (14:03): Mr President, I ask a supplementary question. The Minister for Finance says this measure is fully funded. He cannot even tell us how much it costs, let alone tell us how it is funded. I will ask the same question again. The centrepiece of the budget, according to the government; the 10-year tax plan for a reduction in the company tax rate over the 10 years: how much does it cost?