Answer: 2 boxes
Step-by-step explanation: first realize that 7 times 8 is 56 so the manager wants 56 rolls in stock and you only have 40
then subtract 56 - 40 = 16 and this means you need 16 rolls
remember that there is 8 rolls in a box and 16 divided by 8 is 2 so 2 boxes should be ordered
hope this helps mark me brainliest if it did