1. Create account on LAS server, or use one you already have
2. Log in and go to the store
3. Change "Display Payment Options" to Argentina (I'm using PayPal, I advice you do the same, because of the auto convertion)
4. Make sure the current currency is Pesos (AR$ )
5. Take a look and realise that for 720 Pesos u can get 15700 RP
6. Quick check says that 720 Pesos equals around 43 EUR at this moment
7. For 35 EUR u can get 5725 RP on EUW
8. Buy as many RP as u can get, bigger packs haver better eur/rp ratio... (you buy in Pesos but PayPal auto converts to EUR)
9. Transfer to EUW for 2600 RP
10. Level to 10
11. Profit