Google Sheets API pricing AFTER quota

[adarshpunj]

The default limit is 500 requests/100 seconds per project under the free tier. There's an option to request an increase.

However, I'm looking for some real pricing like pay as you go, can anyone please tell me what will be the charges after the quota? Thank you. 

[nimeshsahu]

And some one pleas also help us with the same issue and please tell us from where we can increase the quota limit of 300 requests for Write requests per minute to 1000 requests.