To view your detailed Coin balance, start by checking the gift icon, which displays your Premium, Bonus, and Gift Coins. For a brief summary of your Coins, navigate to the Settings Menu [≡].
For individual chapter costs, each chapter’s Coin requirement is displayed next to it.
If you wish to purchase all chapters at once, simply click the "Purchase All Episodes" button on the series’ homepage to buy all available chapters in a single transaction.