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