how to insert different buying options according to counteries

hi i have made a game in which i want to include buy coins system

i want to put several buying options like

buy 300 coins at price xx

buy 1000 coins at price xxx

and so on

but 1 thing i don't know how to show prices according to different countries, like $, ¢, £, ¥, €, ₹.

anyone has idea?

how to show price difference and symbol?

I have this solution:

Put a letter or any symbol behind all your price.

Example :

- price 1 : 300 X

- price 2 : 1000 X

Then you need an ID for each country.

Example : "US" for America, "EN" for England

Check the ID after that :

if the ID is US, replace X in the price with "$" and so on.

prices are not constant, it always changes,

suppose if i put price $1 which is equals to £0.77

if price change then it will be a issue

because i will show 0.77 but actually google will deduct more than this according to exchange rates, if exchange rates increases.