! Beasley, assembly, polishing, packing
max 1.5 x1 + 2.5 x2 + 3 x3 + 4.5 x4
subject to
 2 x1 + 4 x2 + 3 x3 + 7 x4 - tass = 0
 3 x1 + 2 x2 + 3 x3 + 4 x4 - tpol = 0
 2 x1 + 3 x2 + 2 x3 + 5 x4 - tpac = 0
 tass < 100
 tpol < 50
 tpac < 60
end