Input table with number validation and combobox

Hi I want to design a form where the user on the first column types an anount (ex: 100) and on the second chooses the product on a combobox. On my first aproach I created an input table with 5 lines and two columns, but I couldnt add the number validation (quantity > 100 kg) and the product combox. My second aproach I added a compressed number input with the rule (>100), I also added a compressed combobox. I did it 5 times, but the space between line were very big. Do you have an sugestion ?

Please take a look at Configurable List widget. This widget allows multiple entries and mixed type of fields just like how you described on your requirement. 

Demo form : https://form.jotform.com/61654821574965

Let us know if you need further assistance.