add more boxes

Thank you very much for the plugin, it works perfectly, I used it to make a volumetric calculation formula that when entering the data of a box, gives the result of the volumetric weight and it works perfectly.
Now, if possible, you should add a function so that after consulting the first box you can put an “add more boxes” button and clear the form, and that the volumetric weight results are accumulated in a different field than “total of volumetric weight” where all the boxes entered are added up.

From this moment I thank you for your answer

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