Hi, can you explain in 1st year economics terms what is and how is a structural deficit calculated. I have an example, be as explicit as possible. Thanks!

Suppose currently an economy is experiencing $3 billion of extra taxes and $2 billion lower unemployment insurance payments than what would be the case at its long-run average rate of unemployment. There is a budget deficit of $40 billion, a publicly held national debt of $400 billion, a money supply of $600 billion, a nominal growth rate of 5%, and an annual seigniorage of $4 billion. The structural deficit of this economy is: