05. Account Balance

function accountBalance(input) {
    let index = 0, total = 0;
    let command;

    while ((command = input[index++]) !== "NoMoreMoney") {
        let cash = Number(command);
        if (cash < 0) {
            console.log("Invalid operation!");
            break;
        } else {
            console.log(`Increase: ${cash.toFixed(2)}`);
            total += cash;
        }
    }

    console.log(`Total: ${total.toFixed(2)}`)
}

РЕШЕНИЕ С FOR:

function accountBalance(input) {
    let total = 0;

    for (let i = 0; i < input.length && input[i] !== "NoMoreMoney"; i++) {
        let cash = Number(input[i]);
        if (cash < 0) {
            console.log("Invalid operation!");
            break;
        } else {
            console.log(`Increase: ${cash.toFixed(2)}`);
            total += cash;
        }
    }

    console.log(`Total: ${total.toFixed(2)}`)
}

ИЛИ С ТЕРНАРЕН ОПЕРАТОР ЛЕКО ТАРИКАТСКАТА:

function accountBalance(input) {
    let total = 0;

    for (let i = 0; i < input.length && input[i] !== "NoMoreMoney"; i++) {
        console.log(Number(input[i]) < 0 ? "Invalid operation!" : `Increase: ${Number(input[i]).toFixed(2)}`);
        if (Number(input[i]) < 0) {
            break;
        }
        total += Number(input[i]);
    }

    console.log(`Total: ${total.toFixed(2)}`);
}