Potatoes cost Janice $1.00 per pound, and she has $5.00 that she could possibly spend on potatoes or other items.

Suppose she feels that the first pound of potatoes is worth $1.50, the second pound is worth $1.14, the third pound is worth $1.05, and all subsequent pounds are worth $0.30 per pound.

How many pounds would she purchase if she only had $2.00 to spend?