Final answer:
The question is regarding the cost of additional toppings for pizzas, but there is insufficient context to provide an answer. More information about the pizzeria's pricing structure is necessary to calculate the costs of toppings for small and large pizzas.
Step-by-step explanation:
The student is interested in determining the cost of additional toppings for two different sizes of pizzas. This type of question falls under the category of mathematics, as it involves arithmetic operations and possibly algebra if more detailed calculations were needed to solve a complete problem. However, with the information provided, such a detailed solution cannot be offered.
Furthermore, the reference to demand equation provided (Qd = 16-2P) is related to the subject of economics, which helps determine the quantity demanded (Qd) at a certain price (P). Nonetheless, the information given does not directly help to answer the question regarding the price of additional toppings for personal pizzas, and seems to be supplemental or background information. Additional context would be necessary to provide a precise cost calculation for the toppings.
Without the necessary context or data linking the provided totals or the demand equation to the cost of toppings, it's not possible to definitively answer the student's question. To accurately answer which option (A through D) reflects the cost for additional toppings on small and large pizzas, more information would be needed regarding the pricing structure of the pizzeria or the specific prices associated with the pizza sizes and respective topping costs.