While working with Big Business (for J4) I noticed 2 small errors that need to be fixed.
There's an erroneous line of code is creating a div that you can't get rid of w/o editing index.php
it's <div id="s5_pricing_bottom"> on line 424. need to remove that and one of the latter </div> to correct.
For whatever reason, the custom BG for bottom row 3 renders with a space between the # and the color code you have selected, making the template not render correctly.
https://imgur.com/a/HSjh3XW
In that image you can see the template settings are set on the left, and over on the far right, you can see the code rendering w/ a space between the # and the number.