This year Zakat ul Fitr in Australia is $15.00 per person. Zakat ul Fitr is obligatory for each person including children.

“The Messenger of Allah (peace be upon him) ordained Zakat al Fitr [Fitrana] to purify the fasting person from indecent words or actions and to provide food for the needy. It is accepted as Zakat for the person who gives it before the Eid prayer, but it is a mere Sadaqah for the one who gives it after the prayer.” [Abu Dawud and Ibn Majah]