To calculate the price per pound of the walnut, we just have to divide that price that Ava paid for the given amount of walnuts. We calculate as follows:
Price per pound = 4.90 / 2.50 pounds of walnuts
Price per found = 1.96 / pound of walnut
Therefore, the price would be 1.96 per pound of the walnut. Hope this helps. Have a nice day.