i-dont-know-js.js

const SPENDING_THRESHOLD = 200;
const TAX_RATE = 0.08;
const PHONE_PRICE = 99.99;
const ACCESSORY_PRICE = 9.99;

var bank_balance = 303.91;
var amount = 0;

function calculateTax(amount){ 
    return amount * TAX_RATE;
}

function formatAmount(amount) {
    return '$' + amount.toFixed(2);
}
// còn tiền thì mua tiếp
while(amount < bank_balance) {
    //mua dt
    amount = amount + PHONE_PRICE;
    //chung ta co the mua phụ kiện dc ko?
    if(amount < SPENDING_THRESHOLD) {
        amount = amount + ACCESSORY_PRICE;
    }
}
// đừng quên trả tiền cho chính phủ
amount = amount + calculateTax(amount);
console.log("Your purchase: " + formatAmount(amount));
if(amount > bank_balance) {
    console.log("You can't afford this purchase.")
}