i took another stab at it at work and finished it. the hard part was just a matter of clicking around stuff to look behind objects. scrubbin, using the 4 pieces and what their sums equal you can figure out the numbers of each of the 4 symbols. to find the sums just look around the room.
Did you have problems finding the gold or silver coin scrubbin? Took me 20 minutes to find the silver one, pissed me off too.