1. Pardeep is spending all of his income on pens and books.He is currently buying his optimal bundle. Pens are $1.6 each and books are $28 each.His marginal utility from the last pen purchased was 8.What was the marginal utility from the last book purchased?
2. Mark is eating from a box of doughnuts, and his marginal utilities for the first three doughnuts are 200, 150, and 125, respectively. The total utility for his first doughnut is:

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