$15 an hour x 40hrs a week x 4 weeks is $2400 a month. Before taxes. Say they are taxed at 22% (may be high, not sure)- that's about $528.
So say they both clear 1900 a month. They both put $1000 towards rent and have $900 for all other of their own bills, utilities, food, gas, emergencies whatever. Forget saving anything.
Could they do it? Sure I guess.
I've seen some of the two bedrooms around here that they are trying to get $2100 for. Last year these same apartments were going for $1200. Nothing has changed about the apartment, just the neighborhood has been declared the place to be. Sorry everyone, time for you to go!