Consider the following chart regarding a medical school.
Total Cost $90 millionCost if school provided only patient care$40 millionCost if school produced only education $60 million
The "pure cost" of patient care is ______, the "pure cost" of education is _____, and the joint costs are _______.
Select one:
a. $30 million; $50 million; $10 million.
b. $50 million; $30 million; $10 million.
c. $40 million; $40 million; $10 million.
d. $30 million; $30 million; $30 million.