A move from offering no presort program to offering a discount greater than 4.5a, then, is not Pareto optimal.
It is not optimal to move from that program.
They should move from the presort program.
A man is looking out the window in his living room.
Two people standing standing near a large statue, with other states nearby.
Solid rocket propellants are the most expensive rocket fuel.
Three boys are playing frisbee on a sandy beach.
Several men around a green table are playing cards.
A young man is kayaking.