1. Rifle:
- Cost of materials: \(475 \, \text{USD} + 108 \, \text{USD} + 19.98 \, \text{USD} = 602.98 \, \text{USD}\)
- Selling price: 800 USD
- Profit: 197.02 USD
2. Rifle 30-06:
- Cost of materials: \(6 \, \text{USD} + 108 \, \text{USD} + 19.98 \, \text{USD} = 133.98 \, \text{USD}\)
- Selling price: 300 USD
- Profit: 166.02 USD
3. Gold Necklace:
- Cost of materials: 220 USD
- Selling price: 370 USD
- Profit: 150 USD
4. 9mm Pistol:
- Cost of materials: \(16.65 \, \text{USD} + 72 \, \text{USD} = 88.65 \, \text{USD}\)
- Selling price: 190 USD
- Profit: 101.35 USD
5. Pipe Pistol:
- Cost of materials: \(90 \, \text{USD} + 29.97 \, \text{USD} = 119.97 \, \text{USD}\)
- Selling price: 200 USD
- Profit: 80.03 USD
6. Sword:
- Cost of materials: \(90 \, \text{USD} + 3 \, \text{USD} = 93 \, \text{USD}\)
- Selling price: 150 USD
- Profit: 57 USD
7. Knife:
- Cost of materials: \(36 \, \text{USD} + 3 \, \text{USD} = 39 \, \text{USD}\)
- Selling price: 80 USD
- Profit: 41 USD
8. Coilgun:
- Cost of materials: \(1900 \, \text{USD} + 162 \, \text{USD} + 1200 \, \text{USD} + 26.64 \, \text{USD} = 3288.64 \, \text{USD}\)
- Selling price: 2500 USD
- Loss: 788.64 USD