Answer:
The cost price of each shirt is $8.
They mark up the shirts 25%, which means they increase the price by (25/100) * $8 = $2.
So, the selling price of each shirt becomes $8 + $2 = $10.
At the end of the year, they sell the shirts for 25% off, which means they reduce the price by (25/100) * $10 = $2.50.
Therefore, the selling price of each shirt after the discount becomes $10 - $2.50 = $7.50.
The profit made on each shirt sold at the end of the year is the difference between the selling price and the cost price, which is $7.50 - $8 = -$0.50.
Since the profit is negative, it means that the Spirit Club is making a loss of $0.50 on each shirt sold at the end of the year.