To calculate the cost of one shirt, you can take the total cost and divide it by the quantity of shirts.
From the data provided, it seems like there are 6 shirts for a total cost of $185.
So, the cost for one shirt would be:
\[ \text{Cost per shirt} = \frac{\text{Total Cost}}{\text{Quantity}} = \frac{185}{6} \approx 30.83 \]
Therefore, the cost for one shirt is approximately $30.83.