Mr SHORTEN (Maribyrnong—Leader of the Opposition) (15:00): My question is to the Prime Minister. Today the government has refused to say the total 10-year cost of corporate tax handouts from 1 July 2018, refused to say the separate cost of all three steps of its personal income tax scheme and refused to provide the year-by-year cost of its seven-year income tax scheme. Is it that the government doesn't know what these numbers are or that it's simply refusing to provide the answer?