Here is the passage again:
Baking in his hot car during rush-hour traffic, Joe slurped up the last
few drops of his iced tea. And hoped that after this week's paycheck he
could afford to make the costly repair to his broken air conditioner.
You chose to use Punctuation Rule 8 to fix the problem:
Main clause + Ø + lonely verb phrase.
The correction looks like this:
Baking in his hot car during rush-hour traffic, Joe slurped up the last
few drops of his iced tea and hoped that
after this week's paycheck he could afford to make the costly repair to
his broken air conditioner.
Well done! You deserve that cyber milkshake!