Board Thread:General Discussion/@comment-12330013-20180119182200/@comment-24577221-20180204070402

Concrete examples:

Buy 4 Dragon Towers for 10,000,000 coins each; sell them back for 7,500,000 coins each. Net cost: 10,000,000 coins. Net gain: 2,500,000 XP each, totalling 10,000,000 XP. Takes a few seconds.

Buy a Big Salad. Net cost: 10,000,000 coins. Net gain: 5,000,000 XP + 750,000 food units. Takes 48 hours.

Or buy 2 cakes. Same net cost, same XP out, but gives you 1,000,000 food units. Takes 48 hours for each; either 48 hours in each of 2 ovens, or 96 hours in 1 oven.