Hello
In the next image I have these three column divisions, where:

-The first section has a col-lg-3
-The second section has a col-lg-2
-The third section has a col-lg-2
After the first two lines comes the totalization.
To show the totalization fields in their correct position (to the right), I create a “ghost” column with a col-lg-5 (to push them to the right).
To show the start of each totalization, I use a dividing line with the following code:
<div class="row h-25">
<div class="col-lg-9"></div>
<div class="col-lg-2">
<hr class="solid my-1 mb-2 bg-color-black">
</div>
</div>
On the above scenario, I have the following questions:
1-How could I make the dividing line occupy all the space of col-lg-2?
2-How to do so that when viewing the form on a phone, the subtotalization section (the label and the input) are not divided and remain on a single line?
Thanks