I am sorry to have to argue, but the multi-region writes are calculated N + 1, where N is the number of regions.
So it would actually set you back $17520 [0].
And yes, I know that even their own documentation and calculator conflict on this, but they do charge the higher number.
We are in the process of updating the Azure pricing calculator to provide various options (e.g., # of regions, single vs. multi-master, etc.). The updates to the calculator are coming shortly.
In the meantime, please feel free to ping us at AskCosmosDB@microsoft.com, if you need any help with cost estimates or have any questions.
0. https://docs.microsoft.com/bg-bg/azure/cosmos-db/optimize-co...