Here is the passage again:
To keep her basset hound away from the pizza, Ana keeps the squirt bottle
close by. So that she can "draw" like a gunslinger if a dog tongue gets
too close to the delivery box.
You chose to use Punctuation Rule 1 to fix the problem:
Main clause + Ø + subordinate clause.
The correction looks like this:
To keep her basset hound away from the pizza, Ana keeps the squirt bottle
close by so that she can "draw" like a gunslinger
if a dog tongue gets too close to the delivery box.
Great work! You deserve every spoonful of that cyber sundae!