1. **State the problem:** Creed wants to find the cost of 1 kg (1000 g) of Halloween Treats when 450 g costs 3.75. 2. **Formula used:** To find the cost per gram, use the unit rate formula: $$\text{Cost per gram} = \frac{\text{Total cost}}{\text{Weight in grams}}$$ 3. **Calculate cost per gram:** $$\text{Cost per gram} = \frac{3.75}{450}$$ 4. **Simplify the fraction:** $$\frac{3.75}{450} = \frac{\cancel{3.75}}{\cancel{450}} = 0.008333...$$ 5. **Calculate cost for 1000 g:** $$\text{Cost for 1000 g} = 0.008333... \times 1000 = 8.333...$$ 6. **Final answer:** The cost for 1 kg is approximately 8.33. **Answer: B. 8.33**