Spud really likes potatoes. At best any other goods are worth less than $0.50 to him, potatoes cost $0.70 per pound, and he has $3.00 that he could possibly spend on potatoes or other items. Suppose he feels that the rst pound of potatoes is worth $1.25, the second pound is worth $0.95, the third pound is worth $0.80, and all subsequent pounds are worth $0.50. Calculate how many pounds of potatoes Spud will purchase and explain why he will purchase this amount