Lupin the 3rd

Lupin is feeling out of sorts, because lately he hasn't been able to get ahold of Fujiko. When he receives a phone call saying that she'll marry him if he passes her test, he takes off, but what he finds waiting for him is Fujiko's aunt, Mine BUJIKO. The test is, either find Rommel's Gold, or pay for failing to do so with his life. Lupin throws himself into deciphering ancient hieroglyphics. What grade does he get?