Ashton works as a marketing manager for a consumer products firm. his total earnings, a, in x months is given by the function a(x) = 2,400x + 40x2. his total savings, s, in x months is given by the function s(x) = 250x + 500.

the function e(x) = 40x^2 + 2,150x - 500 40x^2 + 2,650x + 500 40x^2 + 2,150x + 500 40x^2 + 2,650x - 500 represents ashton’s total expenses in x months.

ashton’s expenses for 3 years total $ 6,310 8,810 128,740 147,740 .