1st Step: Go to the member's profile.
Write the name in the search bar, and click on it to go to the member's profile.
2nd Step: Bill the product.
In the member's profile, click on "Bill" at the right bottom corner.
Click on "Webshop" > Select the right product.
After that click on "Add to invoice" > "Issue the invoice" > Select the billing date and click on "Confirm".
3rd Step: Take the payment.
Click on "Take the payment"
Choose the payment method > and Click on "Confirm payment".