Answer:
the total number of boxes of popcorn sold by the seventh-grade classes is 12.
Explanation:
1. Calculate the total number of boxes sold by Teacher Todd:
Boxes sold by Todd = 12
2. Calculate the total number of boxes sold by Teacher Davis:
Boxes sold by Davis = 0 (since the table is incomplete and doesn't provide this information)
3. Calculate the total number of boxes sold by the seventh-grade class:
Total boxes sold = Boxes sold by Todd + Boxes sold by Davis
= 12 + 0
= 12