An ideal gas undergoes the process A=>B=>C=>A shown in the figure above. The heat gained in process AB is 576 J, while in process BC the system loses 67 J. In process AB the system performs 320 J of work, while in process CA work is done on the system in the amount of 238 J. How much heat is transferred to or from the system in process CA?
A. -427 J
B. -67 J
C. 67 J
D. 427 J