Answer:
a. How many pounds of potatoes will she purchase?
3 pounds
Janice will purchase potatoes as long as the value she assigns to them is higher than the price of potatoes. She values the first 3 pounds at more than $1 per pound. But Janice only values the subsequent pounds of potatoes at $0.30 per pound and that is lower than their price.
b. What if she only had $3.00 to spend?
she would still buy the 3 pounds