How do you solve the grow island game

The order of the items to maximize all levels is:
1. bolt (position 8)
2. axe (position 3)
3. logs (position 6)
4. steering wheel (position 5)
5. smokestack (position 7)
6. battery (position 1)
7. computer chip (position 2)
8. burner (position 4)


For the UFO ending (max UFO):
1. Aeronautics, Marine, Automotive Engineering - Steering Wheel - 5
2. Civil Engineering - Pick Axe -3
3. Architecture - Logs - 6
4. Computer Science - Chip - 2
5. Electrical Engineering - Battery - 1
6. Mechanical Engineering - Bolt - 8
7. Applied Chemistry - Burner/Candle - 4
8. Environmental Engineering - Smokestack - 7