I would think the number is significantly less. Just off the top of my head,
$4.00/hr goes to rent. ($693.20/mo or ~$22.79/day)
$3.75/hr goes to food. (~$650/mo or ~$21.36/day)
$0.87/mo goes to utilities. (~$150/mo)
$0.06/hr goes to health insurance. (~$10/mo)
gets me $8.68 to cover the big expenses. $10 is certainly a living wage where I live, coincidentally it will be the minimum wage later this year.
~Max