Have you really confirm the chosen items? The next page will bring you to the checkout page.
Click 'Back' if you're unsure.
You can double check the quantity, remove (click minus -) or add (click plus +) to customise the items in your box.
or
Click 'Complete' if you're very sure!
NOTE: After pressing the "Complete" button, you will no longer be able to modify your items. If you wish to modify, you will have to restart the mix and match process.