sum of values

I am creating a form to order custom screen printed shirts. I have everything working on the form as far as selecting a shirt, the size and price, but I am lost in figuring out how to total the price. I need each row totaled across as well as an order total for the "Total" column at the bottom. I have attached a quick Photoshop representation of what I am trying to accomplish.

How do I go about doing this?

Sorry, it didn't attach to the original post.

[attachment=0]sample.jpg[/attachment]

Hi tjhaas,

Here's the chunk of code I used in a similar form - a bit more complicated that yours:

  /** Calculate the total order price and discounts */
  function calculateTotals() {
    var total_price, shirts, polos, non_polos, discount;
    total_price = 0;
    shirts = 0;
    polos = 0;
    jQ.each(garments, function(garment, data) {
      total_price += data.price;
    if ( data.style != '' ) {
        shirts += 1;
      }
    });

    discount = 0;
    if ( shirts > 5 ) {
      discount += shirts * 4;
    } else if ( shirts > 2 ) {
      discount  += shirts * 2;
    }

    price_text = '£'+total_price.toFixed(2);
    if ( discount > 0 ) {
      price_text += ' less quantity discount of £'+discount.toFixed(2)+' : £'+(total_price - discount).toFixed(2);
    }

    jQ('#total_price').text(price_text);
  }

Bob