Currency Converter

function converter([arg1, arg2, arg3]) {
//Input
    let sum = parseFloat(arg1);
    let inputCurrency = arg2;
    let outputCurrency = arg3;

//Code
    if(inputCurrency === 'BGN') {
        if(outputCurrency === 'USD') {
            sum /= 1.79549;
        } else if(outputCurrency === 'GBP') {
            sum /= 2.53405;
        } else if(outputCurrency === 'EUR') {
            sum /= 1.95583;
        }
    } else if(inputCurrency === 'USD') {
        if(outputCurrency === 'BGN') {
            sum *= 1.79549;
        } else if(outputCurrency === 'GBP') {
            sum *= 1.79549 / 2.53405;
        } else if(outputCurrency === 'EUR') {
            sum *= 1.79549 / 1.95583;
        }
    } else if(inputCurrency === 'GBP') {
        if(outputCurrency === 'BGN') {
            sum *= 2.53405;
            console.log(sum);
        } else if(outputCurrency === 'USD') {
            sum *= 2.53405 / 1.79549;
        } else if(outputCurrency === 'EUR') {
            sum *= 2.53405 / 1.95583;
        }
    } else if(inputCurrency === 'EUR') {
        if(outputCurrency === 'BGN') {
            sum *= 1.95583;
        } else if(outputCurrency === 'USD') {
            sum *= 1.95583 / 1.79549;
        } else if(outputCurrency === 'GBP') {
            sum *= 1.95583 / 2.53405;
        }
    }

//Output
    if(outputCurrency === 'BGN') {
        console.log(`${sum.toFixed(2)} BGN`);
    } else if(outputCurrency === 'USD') {
        console.log(`${sum.toFixed(2)} USD`);
    } else if(outputCurrency === 'GBP') {
        console.log(`${sum.toFixed(2)} GBP`);
    } else if(outputCurrency === 'EUR') {
        console.log(`${sum.toFixed(2)} EUR`);
    }

}

converter([
    '12.35',
    'EUR',
    'GBP'
]);

//Value
//1 BGN
// USD 1.79549
// EUR 1.95583
// GBP 2.53405