Earlier quoted context omitted.
25 dollar hamburgers? That sounds so strange.
Genuine Q: is $25 a lot for a burger in a restaurant (including tax, like in Australia)? I ask because I see burgers in mid range restaurants for $14-$20 here in NYC, and then there's the 8.825% tax. 25 AUD is ~ $18 USD, which seems about right.
Grilld is a popular mid-range burger chain and their burgers range from AUD $9 to $16.90 (USD $6.60 to $12.40). All advertised retail prices in Australia include 10% GST (good and services tax).
At a more formal restaurant you will likely find a AUD $25 burger but that's about the top end for burger prices.