* WILL GET BRAINLIEST ANSWER **** PLEASE HELP!!!

Answer:
19 shirts.
Step-by-step explanation:
First, remove the profits of the hats from the equation. 168 - 54 = 114.
Then, divide the profits by 6 to dertermine the amount of shirts sold. 114 / 6 = 19, which should be your answer!
Hope this helped. :D