April 30, 2013 - 4:24PM Efficiencies, including the lowering of costs for bad loans, have helped ANZ Bank post a higher than expected profit and dividend. The federal government could impose an emergency tax on imported tin fruits to save Victorian Goulburn Valley fruit growers and cannery SPC Ardmona from collapse. Qantas chief executive Alan Joyce says Australia's airports should try to keep parking costs down. Diversified miner Rio Tinto has opened its $US2.2 billion Argyle underground diamond mine in Western Australia's East Kimberley region. Andrew "Twiggy" Forrest's Poseidon Nickel will re-open the historic Windarra nickel mine in Western Australia. Profits are up but service at Australian airports has fallen across the board and Sydney Airport is the busiest and worst performing, the consumer watchdog says. Whitehaven Coal is looking to find more cost savings as the miner battles weak coal prices and a high local currency.