To find out how many shirts were sold, we need to calculate 11% of the total sales (4,560).
First, we can convert the percentage to a decimal:
11% = 0.11
Now, we can calculate the number of shirts sold:
Number of shirts sold = 4,560 sales × 0.11 = 501.6
Since we can't have a fraction of a sale, we round to the nearest whole number, which is 502.
Therefore, the number of shirts sold is 502.