For instance. assume that will is a cleaner 1.lrho is working in the cleaning administration organization and Amie employed will to tidy up her room consistently for $100. The open door cost of Will's time is $80, while the worth of a spotless house to Amie is $120. Subsequently. every one of them get same measure of advantage from their arrangement. Amie and will each get an advantage of $20. making the all out surplus from exchange $40