1. Let's use actual dollar amounts for the circular flow model. Suppose that businesses buy a total of $100 billion of the resources (land, labor and capital) from households. If households receive $70 billion in wages and $10 billion in rent. How much do households receive in interest? In this simple circular flow model, how much is spent in the product market after that $100 billion of income is received?

ps. I have to answer this question looking at a circular flow model for macroeconomics class but I don't know how to find the interest