The exact price of Atlas Serverless in each region?

The document shows a range, I would like to know the exact price in each region. How can I get it?

The content of the document is something like “Storage: Range from $0.20 to $0.70 per GB per month”. But how do I know, for example, if I store 1GB of content in AWS Singapore for a month, should I pay 20 cents or 70 cents?