Bella bakes delicious cookies. Her total fixed cost is $48 a day, and her average variable cost is $1.20 a bag. Few people know about Bella's Cookies, and she is maximizing her profit by selling 12 bags a day for $5.50 a bag. Bella thinks that if she spends $60 a day on advertising, she can increase her market share and sell 30 bags a day for $5.50 a bag. If Bella advertises, will her average total cost increase or decrease at the quantity produced?

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