I haven’t seen this linked anywhere in this thread, specifically why Australia is paying a large chunk even though it was a flight from Malaysia to China is that the area that it is suspected to have gone down is in Australia’s Martime Search and Rescue Area.
Here is a map of the areas:
http://www.neptune-scuba.info/sar/carte-sar-map.gif
(couldn’t find a higher res one sorry).
Oh an apparently another suspected MH370 plane part has washed up: