dessert A

dessert B

d_1: y = (-1 / 2 * x) + 35
d_2: y = (-2 * x) + 80
I = Intersect(d_2, d_1)
O = Point(yAxis)
A = Intersect(d_2, xAxis)
B = Intersect(d_1, yAxis)
domaine, o, a, i, b_1 = Polygon(O, A, I, B)
b = 340 (slider from 200 to 500, step 5)
d_{b/8}: (6 * x) + (8 * y) = b
S = (20, 15)
P: (25, 20)
R: (20, 30)
d_{240}: (6 * x) + (8 * y) = 240
d_{400}: (6 * x) + (8 * y) = 400
d_{340}: (6 * x) + (8 * y) = 340