title: Calculate price from quantity input box in jQuery
body: <p>I'm having a small issue calculating price from Quantity in jQuery. Those are the input boxes i have.</p>
  
  <pre><code>Quantity: &lt;input type="text" style="width: 50px;" name="quantity" id="quantity" class="txt" value="1" /&gt;
  
  Price: &lt;input type="text" style="width: 50px;" name="item_price" id="item_price" class="txt" value="2990" /&gt;
  
  Total Price: &lt;input type="text" style="width: 50px;" name="total_price" id="total_price" class="txt" value="" /&gt;
  </code></pre>