How to not send info from empty dropdownlist to google sheets

Hi, I have created a page for registration of withdrawals, of goods from stock. In the dropdown list, you select an item and enter the number of items taken in the input window. I have created multiple dopdowns and input windows, so you can register more items at the same time.

I have the following api call at nr1. Product Name: Select Dropdown List 1s Value and Number of Products: Input Number of Products 1s Value

api call 2; choose dropdown list 2s value Choose dropdown list 2 value is empty and quantity of products: input number of products 2s value input number of products 2`s value is empty

but when I press save, it says NO for product name and number on api call 2 in google sheets. And, I’ve left it blank in dropdown and input, so only send NO to sheets.

How do I get bubble to send only the entry that is added to the dropdown list and input window? While dropdown and input that are empty do not send to sheets?

Thanks