Answer: The price of each shirt she bought was $22.95. 
Explanation:
Hi, to answer this, first, we have to add to the discounted price (52.22) the amount of the credit (39.58), to obtain the original total cost (without discount). 
So: 
52.22+39.58 = $91.8 
Since she bought 4 shirts, we have to divide the total cost by 4: 
91.8 /4 = $22.95 
The price of each shirt she bought was $22.95.