a(x, y) = x + y ≤ 550
b(x, y) = x + (3 * y) ≤ 1000
c(x, y) = (2 * x) + (5 * y) ≤ 2000
d(x) = x ≤ 400
A = Point(d)
B = Point(d)
C = (400, 150)
D = (325, 225)
E = (0, 333.33)
F = Point(d)
G = Point(d)