1. The problem asks to calculate the price per year for each raw material by multiplying the cost per kg by the amount per year (in kg). 2. The formula to use is: $$\text{Price per year} = \text{Cost per kg} \times \text{Amount per year (kg)}$$ 3. Calculate for each material: - Used oil: $1.20 \times 175.1558887 = 210.18706644$ - Xanthum gum: $2.00 \times 2.977650109 = 5.955300218$ - Potassium hydroxide: $3.40 \times 19.96777132 = 67.89052249$ - Orange peels: $0.52 \times 875.7794437 = 455.0023071$ - Activated charcoal: $5.80 \times 83.89967071 = 486.4176901$ - Citric acid: $5.00 \times 5.254676662 = 26.27338331$ 4. These are the calculated prices per year in dollars for each raw material. 5. To find the total cost per year, sum all price per year values: $$210.18706644 + 5.955300218 + 67.89052249 + 455.0023071 + 486.4176901 + 26.27338331 = 1,251.72626966$$ 6. Thus, the total price per year for all raw materials is approximately $1,251.73$.