Calculate Mr. Claus' expenditure function.

6. (16 points) Mr. Claus gains utility from the consumption of milk and cookies. He is very peculiar about his eating habits, however, always requiring 2 cookies (C) for each glass of milk (M). Thus his utility function can be written: U = min 4, M . Unfortunately, since the 2 formation of the elf union Santa's food budget is rather limited. He has only I dollars to spend on cookies which cost P. each and milk which costs Pm per glass