You are planning a surprise birthday party for your friend [friend_name]. You need to buy decorations, a cake, and some gifts. The budget is [budget_amount] dollars. List the items you would buy and their costs, ensuring the total does not exceed the budget. Your response should contain exactly 4 bullet points. Use the markdown bullet points such as: * This is point 1. Highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*.
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