const phone_price = 102.22;
const tax = 0.08;
const price_thereshold = 230;
const accessory = 10;

var account_bank = 310;
var amount = 0;

function withTax(amt){
  return amt * tax;
}
function formatted_price(amt){
  return "$" + amt.toFixed(2);
}

while(amount < account_bank){
  amount = amount + phone_price;
  if(amount < price_thereshold){
    amount = amount + accessory;
  }
}

amount = amount + withTax(amount);
amount = formatted_price(amount);

console.log("your purchase price: " + amount);

if(amount > account_bank){
  console.log("you haven't afford for your purchase");
}