[рони]

NovichokJS,

const cleanTransactionsList = arrTransactions => {
            return arrTransactions.filter(elem => elem == +elem).map(elem => {
                return '$' + Number(elem).toFixed(2);
            });
        }
        console.log(cleanTransactionsList(['  1.9 ', '16.4', 17, ' 1 dollar ']));
        // ['$1.90', '$16.40', '$17.00']