Invoicing or Purchase order options: Please complete the full registration and proceed to checkout. During the online checkout process, select the “Invoice Me” option from the payment method drop down menu. An invoice will be generated for you order. Once the order is submitted, it may be viewed/printed in the Recent Orders of your My SOPHE user account homepage. Outstanding balances can be paid online via credit card by selecting the “Pay Outstanding Orders” link on the user account homepage.