Sign in first and click on the payment area

Choose one of the pay or apply a coupon code (if you have recieved any coupon code from editor in chief)

If there is any subscription, the page as below can be seen, click on the pending item

Confirm the basket and proceed to payment

In the payment area, click on the pending item in the Invoice part

Enter your coupon code as i.e. below

You see the page as below, click on back to Invoice

After click on pay link, the page as below is shown

After choosing one of the E-Pay, the page as below is shown, click on back to Invoice

Click on Proceed in Invoice part

After finishing the process,in Invoice part, click on paid and archived items, you can see the page as below