Suppose carlos wants to order 40 light bulbs for the factory.He can buy light bulbs in boxes of 4 or 8. How many ways could he order exactly 40 bulbs?
List all possible ways he could order 40 light bulbs.

1. 5 packs of 8
2. 4 packs of 8, 2 packs of 4
3. 3 packs of 8, 4 packs of 4
4. 2 packs of 8, 6 packs of 4
5. 1 pack of 8, 8 packs of 4
6. 10 packs of 4