Answer:
77 boxes
Explanation:
Step 1:
Lana's troop must sell 1000 boxes of cookies, but there are 13 girls in total. Supposing that each girl will sell an equal amount of boxes, we can simply divide:
÷
boxes.
Step 2:
However, it would seem unlikely that the girls would decide to sell fractions of a box of cookies. We should round...up or down?
If we round down, each girl will sell 76 boxes of cookies. Hmm... then they would'nt be able to sell a total of 1000 boxes of cookies! We need to round up.
Therefore, each girl should sell at least
boxes.
I hope this helps! Let me know if you have any questions :)