Kiran buys supplies for the school's greenhouse. He buys F bags of fertilizer and P packages of soil. He pays $5 for each bag of fertilizer and $2 for each package of soil, and spends a total of $90. The equation 5f + 2p = 90 describes this relationship. If Kiran solves the equation for P, which equation would result? (A) 2p = 90 - 5f (B) p = 5f - 90/2 (C) p = 45 - 2.5f (D) p = 85f/2