Donna runs a bookstore, and she has noticed that she is not selling many children's books. How do supply and demand shape Donna's problem, and what are some ways she might be able to sell more children's books?

If there are lots of children books there little to no urgency to purchase them therefore the demand goes down. Because the sale for them are low to make up the money spent on them the prices increase further driving people away from purchasing. Some potential ways for her to sell more would be to lower the cost or lower the variety.