Iron IV to Iron III 5€
Iron III to Iron II 5€
Iron II to Iron I 5€
Iron I to Bronze IV 6€
Bronze IV to Bronze III 6€
Bronze III to Bronze II 6€
Bronze II to Bronze I 6€
Bronze I to Silver IV 7€
Silver IV to Silver III 7€
Silver III to Silver II 7€
Silver II to Silver I 7€
Silver I to Gold IV...