I'd suggest looking at this page as an indicator (https://www.joyent.com/public-cloud/pricing https://www.joyent.com/public-cloud/pricing -- Bandwidth tab): all

I'd suggest looking at this page as an indicator (https://www.joyent.com/public-cloud/pricing https://www.joyent.com/public-cloud/pricing -- Bandwidth tab): all inbound traffic free, outbound is 12 cents/GB after the first GB, cheaper at higher tiers.