Essentials of Economics 7th Edition by Gregory Mankiw

Exercise 27

Cups of coffee and donuts are complements. Both have inelastic demand. A hurricane destroys half the coffee bean crop. Use appropriately labeled diagrams to answer the following questions.
a. What happens to the price of coffee beans?
b. What happens to the price of a cup of coffee? What happens to total expenditure on cups of coffee?
c. What happens to the price of donuts? What happens to total expenditure on donuts?