Difference price and profits

[autsama]

I have multiple price and lower profits in every building than my syster.

I have to pay twice as much or more for exactly the same items and them make a less $.

Why all this unnecessary unfairness?

[DaojinWildfire]

Changes to features or prices may occur as you continue to play the game. We continue to make adjustments to the game's economy and balance to ensure the prolonged quality of the game for both new and existing users.