USPS has raised their rates. Senders be advised.

You are lucky you are still getting 'service'. USPS has suspended air mail to many countries because of covid [ lack of planes in the air I guess ], including Australia.
Didn't bother to inform the sender or the receiver. Been waiting 5 weeks now from parts from Tenn. Tracking # just says 'in transit'. Could be coming by canoe for all that tells you.