The school store is selling student planners. It costs $2 each week to advertise the planners. The store buys each planner for $2.00 and sells them for $4.50 each. Write an equation to model the amount of profit, P, the school store makes from selling x student planners in one week.

A. P = 2.5x − 2
B. P = 4.5x − 2
C. P = 2x − 2
D. P = 2x + 2.50