Why is the title symbolic of Nora’s life?

A man walks into the toy store to get a Barbie doll for his daughter. So he asks the assistant, as you would, “How much is Barbie?”
“Well,” she says, “we have Barbie Goes to the Gym for $19.95, Barbie Goes to the Ball for $19.95, Barbie Goes Shopping for $19.95, Barbie Goes to the Beach [...]

In these two stories by Henrik Ibsen and Sophocles, respectively. PLEASE HELP ME!!!!!