Assume That the Demand Curve for a Commodity Is Represented

Multiple Choice

Assume that the demand curve for a commodity is represented by the equation Q = 25 - 1.3P.Calculate the change in total spending for this commodity when price falls from $4.50 to $4.20.

A) Total spending rises by $4.11.
B) Total spending declines by $4.11.
C) Total spending declines by $8.20.
D) Total spending rises by $8.20.