Currency Converter

function currencyConverter([arg1,arg2,arg3]){
    let fixedRate = {USD: 1.79549, EUR: 1.95583, GBP: 2.53405, BGN: 1 };
    let result = arg1 * fixedRate[arg2] / fixedRate[arg3];
    return `${result.toFixed(2)} ${arg3}`;
}