Please note that we update our metal markets each day between 10:15 and 11:15 a.m MT. If you place an order for precious metal items during this time, you may see a slight difference between the total on your order confirmation and the total on your invoice. Please also allow a 10% tolerance for the weight/cost of any products that have been cut-to-order and sold by weight; although we make every effort to be precise, actual weights may vary slightly. Complete guidelines on our precious metal items are available here. The subtotal and total shown here are estimates. Your final charge will be listed on the invoice that's packaged with your order. We use the base price set by international metals dealer Handy & Harmon. You can read more about how we determine our daily market price here