I have an MBA in Finance from a reputed college. And a GMAT score of 740 (97%) to indicate my analytical and problem solving ability.
[login to view URL]
[login to view URL]
These two links explain the allocation of stocks after the merger in detail. Please let me know if you still need help in calculating your returns. If you do, I would need little more information than you have already provided (for example, documents you would have received from Westfield and your current holdings). I can provide google portfolio with the appropriate stocks as well.
Regards,
Sudheer