Answer:
64 ounces of flour
Explanation:
To convert the amount of ounces needed when lily´s mother asked to bring 4 pounds is just matter of multoplying the number of ounces that one pound has by the number of pounds needed you can obtain the amount of ounces needed.
So if 1 pound= 16 ounces
Then 4 pounds would be:
You just have to multiply 4 by 16 and divided by one, that is 64.