Christan is buying a $150.00 restaurant voucher as a gift for his nephew, who passed his final medical exam.

Which of economist Milton Friedman's buyer value formulas would apply to Peter's purchase?

A.

Spending someone else's money on someone else

B.

Spending his own money on himself.

C.

Spending his own money on someone else.

D.

Spending someone else's money on himself.

E.

Spending someone else's money on his nephew.