Coins

    var coins = 0;
    var tokens, result = '';
    input.forEach(function (elem) {
        tokens = elem.toLowerCase().split(' ');
        if (tokens[0] === 'coin') {
            if  ((Number(tokens[1]) % 1 === 0) && (Number(tokens[1]) >= 0)) {
                coins += parseInt(tokens[1]);
            }

        }
    });

    result = 'gold : ' + parseInt(coins / 100) + '\n';
    coins %= 100;
    result += 'silver : ' + parseInt(coins / 10) + '\n';
    coins %= 10;
    result += 'bronze : ' + coins;

    console.log(result);