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There is a <https://github.com/infracost/infracost/pull/719#discussion_r640177054|discussion on one of the issues regarding the aws data transfer>:
For `intra-region data transfer` , AWS calculator applies the same amount for in-bound and out-bound rates. So if you set the usage of intra-region to 1000 GB you will get:
```Intra region:
(1000 GB x 0.01 USD per GB outbound) + (1000 GB x 0.01 USD per GB inbound) = 20.00 USD```
But's it's probably far from reality. Do we have to split it to 2 sub-usage data for inbound and outbound or just stick to what AWS does for the sake of simplicity?

I would choose the way AWS calculator does it.

+1 on what AWS calc does, maybe we can tweak the usage file comment to say?
`Monthly data transferred between availability zones in the region. Infracost multiplies this by two to account for AWS charging in-bound and out-bound rates for it.`