Account Balance

function accountBalance(input) {

    let index = 0;
    let account = 0;
    let command = input[index];
    index++;

    while (command !== "NoMoreMoney") {
        let money = Number(command);

        if (money < 0) {
            console.log("Invalid operation!");
            break;
        }

        account += money;

        console.log(`Increase: ${money.toFixed(2)}`);

        command = input[index];
        index++;

    }

    console.log("Total: " + account.toFixed(2));
}

accountBalance(["5.51", "69.42", "100", "NoMoreMoney"])