A gas is compressed from an initial volume of 0.42 m³ to a final volume of 0.12 m³. During the quasi-equilibrium process, the pressure changes with volume according to the relation P = aV + b where a = -1200 kPa/m³ and b=600 kPa. Calculate the work done during this process.

A) -288 kJ
B) -336 kJ
C) -360 kJ
D) -408 kJ