The theme "obedience and control" can be noticed when Helmer asks not to be disturbed and asks "did you say? All these things? Is my little spender losing money again?" here shows a tone of Herlmer control over Nora. It also shows that Nora needs to answer what she does and that shows obedience.
The excerpt also shows the importance of money when Nora explains that she is spending money because there will be no need to save money this year.