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John wants to buy some gifts for his brother and sister with his pocket money. He wants to buy 1 T-shirt, 3 CDs, 5 books for his brother and 2 T-shirts, 4 CDs, 3 books for his sister. Each T-shirt costs $50, each CD costs $10, and each book costs $5. Use a matrix to find the total cost of gifts for both John’s brother and sister.

John’s brother $

John’s sister $