In JavaScript doing a simple shipping and handling calculation

Question

I am having trouble with a simple JavaScript calculation. My document is supposed to add $1.50 to an order if it is $25 or less, or add 10% of the order if it is more then $

Answer 1

var price = parseFloat(window.prompt("What is the purchase price?", 0)); 
var shipping = calculateShipping(price); 
var total = price + shipping; 
function calculateShipping(price){ 
  var num = new Number(price);
  if (num <= 25){  
    return 1.5; 
  } else{  
    return num * 10 / 100 
  } 
} 
window.alert("Your total is $" + total + "."); 

This should do it for you.