Build a Calculator to display phone call prices (By country, prefix, sub prefix) for my website

Job ID: 30820006

Budget: €30 – €250 EUR

I need a calculator built to be displayed on my website to display phone call prices (By country, prefix, sub prefix)

The challenge is to first model the data so all data sources are compatible, then visualize it in a clear way.

This will help users "very clearly" understand my offering vs the competitors so a clean display is important. I mocked up as best I could (attached) what I want but am very open to a better Visualization.

My thoughts would be javascript but any data visualization or other method... as long as it looks good and functions I'll be thrilled!

Notes:
- Open API's attached for Skype and Sonetel + my rates
- I have a Developer who runs my server I can connect you with if you have technical questions

To summarize,
1. Website users need to be able to search and review call rates
2. Website users need to be able to compare rates against other providers
3. Added to my website or something I can embed easily that's responsive.

I have much more work for a good tech writer including automating my Backend telephony system, google translate API, etc... Just throwing that out there as the winner hopefully will want to work with me ongoing.