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You can also Edit Order from Edit order link. This will redirect you to E-Commerce landing page from where you have selected the product.
Click "Place your order now" to process further with placing order.
* After placing order you will get the screen added below. 
Above screen lets you know that the order has been placed successfully.
If you want to go back to E-Commerce site and continuing the purchasing then click on Retrun circle and If you want the updates about the current status of your order then click on "Get-up-to-date-order-progress" link.