The prices of mining Bitcoins depend of your equipment. The price of Bitcoins also depends on your cost to run your business like electric, housing space and spare part and work labor and then how much you need to pay in tax out of your profit.

If we just looks at the electric price then  South Korea comes in as the most expensive country for mining a single coin at $26,170 and Venezuela came in as the cheapest nation at $531. According to this https://www.elitefixtures.com/blog/post/2683/bitcoin-mining-costs-by-country/