Mandatory estimates of Y2K expenditure produced by publicly listed Australian companies for the Australian Stock Exchange have so far revealed a collective bill of more than A$1.7bn. Corporate returns to the Australian Stock Exchange, due to be completed by June 30, have unearthed a reported A$255m bill for the National Australia Bank, an A$85m spend for BHP, and a A$90m fix-it budget for Coles Myer. Other big spenders are Lend Lease (A$75m), Colonial (A$40m) and Macquarie Bank (A$10m.) Telstra Corp’s Y2K budget will run to A$500m, Australia’s largest compliance spend.