BCI is a CITES Appendix II listed animal. So, you will need to get an export permit and you will need to get CITES paperwork. The above items will take about 3-4 weeks to aquire, and will cost you about $305. You will then need to either find a freight forwarder or do the shipping yourself. A forwarder will charge you about $500 to do it for you. You will still have to get a vet health certificate, which will cost about $150. Shipping on the airline will run you $400. If you do it yourself, you will also have to take care of the FWS inspection. Also, let your friend know that she will be responsible for the VIT taxes on her end. Lastly, she will need to check around in Denmark and find out what requirements they have for her to leagally import into the country, as everything that I discussed is on the export end. All in all, it usually costs between $800 and $1300 to ship international depending on where it is going, and if you do the shipping yourself or not.
I hope that helps,