Hermione has the following demand curve for pizzas per month: PO 25 15 10 P $35 30 5 Q 1 2 3 4 5 6 The pizzeria down the block sells pizzas for $15 apiece. Hermione does telemarketing from her home whenever she feels like it and earns $10 per hour. In addition, Hermione can, after a certain amount of research, cast a one-month long spell on the pizzeria owner to sell pizzas to her at $5 apiece. How many hours would it be worth to her to research and perfect this spell?