You have two developer account options with Shoutem when publishing to Google Play:
1. Publish using Shoutem's developer account, with the app under ShouteEm's name
All apps released through Shoutem's Google Play account must be free of charge, and you're unable to select anything but Free in the Application Price dropdown if you've selected "Publish the app under Shoutem developer account".
The reason for this is that Google requires personal/company financial or bank account information to transact or deliver your payment from this per-app charge.
2. Publish using your own developer account, with the app under your name/company's name
To charge for your app, you'll need to create a paid Google Play developer account here if you haven't yet:
When this process is complete, you must invite Shoutem as an administrator of your developer account.
After this complete, select "I have my own developer account", and you'll have the option to choose your pricing in the dropdown.