Networking costs calculation for accessing GCS

[vinivas]

Hello

I have setup a private service connect for google storage in one of the projects where i have GKE running. I would like to access the buckets residing in different locations. The access works fine in my case, but I m still not sure if there egress costs associated with this transfer. If yes, how is it calculated? For instance i have a bucket in mumbai that is being accessed from the US cluster, do the routing charges of 0.08$ per Gi and 0.01$ for the PSC? 

Is there a cost associated with the data transfer from a bucket to the GKE even when they are in the same region? 

Thanks in advance