Can you answer Cait’s question about Conferencing?:

So I understand that it is free to call other Skype users from computer to computer.
If I call a cell or landline, how much does it cost me and how much does it cost the person I’m calling? (per minute or hour)
Does it cost anything extra to call internationally? (I’m going to Costa Rica for a month and I’m wondering about making calls back to the US and having people call me there.)
How about video conferencing between computers?

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