Determine if each of the following costs would be included when calculating accounting profit, economic profit, or both. 

a. Anna, the owner of a local bike repair shop, uses her time to operate her business instead of accepting an annual salary of $100,000 at Ford Motor Company. 

b. Nordstrom pays $50 per square foot to lease space in a shopping mall. 

c. In 2018 Amazon opened its new office building in downtown Seattle. Instead of using the new office space itself, Amazon could have rented out the space to local companies for $250,000 per floor per year. 

d. In 2018, Boeing paid its Washington State employees nearly $600 million in bonuses.