I live with parents, so its differers
How much i earn: varies shift to shift..... on average $500..... but can be as high as $1000 in the summer (i work as a chef)
How much i spend:
House - My parents don't ask me to chip in for the mortgage, but however i chip in $50 into the gas/water/power bill whenever they come
Car - $75 per/week ($50 on petrol, $25 on insurance/rego/maintenance money on the side to pay whenever they come)
Food - varies (from $20-$50 per week)
Random stuff (when im bored, i buy) - varies (from $20-$200 per week)