Answer:
Trade is possible, their  opportunity cost are diferent.
Explanation:
They will trade if there is a benefit. To know if they will benefit from trade we haveto check the opportunity cost.
[tex]\left[\begin{array}{cccccc}-&Boxes&OP Boxed&Cookies&OP Cookies\\Stephen (p)&70&2.5&28&0.4\\LeBron(p)&20&4&5&0.25&\end{array}\right][/tex]
Their opportunity cost are diferent so there will be trade.
Do a cooky cost stephen 2.50 boxes
While to Lebron it cost 4 boxes
If they trade, they will benefit.
