Question: The 7th Inning is buying Ohio State T-shirts. The cost of the shirts, which includes permission fees paid to Ohio State, will be $10.90 each if 1,000 shirts are purchased. Charlie sells 800 shirts before the football season begins at a 50% markup based on cost. What is the gross margin (markup) if Charlie sells the remaining 200 shirts at a 25% reduction from the selling price?