Hi,
For each DropDown Menu, you can have an OnChange action. That action could update the displayed data taking into account the option selected.
I've created the OnChange action as an example. For example, you can use as input the dropdown's labels.

After that, you use those labels to create the expected output. As an example, the action concatenates all the input values.

If you need more help, let me know.
Regards,
Diogo Reis