Cuz Bunny is girl 1, Juliette is girl 2, and it seems that it maybe assigns the cost based on when they are acquired rather than based on just the total amount of girls with it defaulting to their position in the list after the update... So everything from Juliette seems to be doubled, including the costs in money for the scenes... So I can only imagine the 50th girl costing 50 times as much as Bunny...