A bungee jumper with a weight of 588 N leaps off a bridge.  The jumper is in free fall for a distance of 24.0 m before the cord begins to stretch.  How much work, in kilojoules, does the force of gravity do on the jumper before the cord begins to stretch.  

Show all work, starting with the formula and variables, then the rearrangement of variables if needed, then the substitution of values into the equation otherwise no marks will be awarded.