Tap the + button at the top of the game screen shows the amount of gems, or Tap the SHOP button at the bottom of the menu.
Then you'll see the amount of gems and purchase the right amount.
Super Baseball League
Tap the + button at the top of the game screen shows the amount of gems, or Tap the SHOP button at the bottom of the menu.
Then you'll see the amount of gems and purchase the right amount.