haha.... Not so hard to calculate. Spend 1 Hive. Curate until the lease runs out. Check how much money is in the account :)

If it is more than the 1 Hive I spent I made money. If it is more than 0.5 Hive then between myself and those I upvoted we win. If it is less than 1 Hive...then I screwed up. hehe