Really Helpful! Thank you

Hey John , thank you , when u sad 'can add the weight ' u mean write it manually ?

You need first enable pack function. After click Put in Pack, you will find an pack icon in all product lines. Click one of the icons and fill in a weight regardless the package type would be the total package weight. It solved my situation and I vote John Doe's solution as the correct answer to the question.

Hi Frank , yep i understand but if i have variable weight ? what can i do in this case ?

It depends on the scale you use. You can either write it into the field manually using your keyboard or you just buy a scale which will fill in the field when you click some button on the scale. So in any case you will need to click the weight field with your mouse to "activate" it for writing into it.

Hope it helps