If Bianca advertises, will she continue to sell her cookies for $5 a bag or will she change her price?

Bianca bakes delicious cookies. Her total fixed cost is $40 a day, and her average variable cost is $1 a bag.
Few people know about Bianca’s Cookies, and she is maximizing her profit by selling 10 bags a day for $5 a bag. Bianca thinks that if she spends $50 a day on advertising, she can increase her market share and sell 25 bags a day for $5 a bag.