I think it should be like this, (13+7)*2*(8.5+7)=620 square centimeters.

If the trademark paper is covered on all sides and one side is added, the whole blue part above is the answer you need, that is, the area of the trademark paper you need.

But if you typeset the picture below, the rest in the middle can be used, saving resources.

I hope I can help you.

Maybe after so long, you already know the answer yourself.

I wish you happiness. . .