$\backslash$table$[[$Question $8],[$Not yet$],[$answered$],[$Marked out of$],[1\mathrm{.}000],[$P Flag$],[$question$]]$

The opportunity cost to a customer for getting a $$10$ haircut is the

a$.$ customer's best alternative use of the $$10.$

b$.$ customer's best alternative use of both the $$10$ and the time it takes to get a haircut.

c$.$ value to the barber of the time it takes to give a haircut.

d$.$ customer's best alternative use of the time it takes to get a haircut.

e$.$ value of $$10$ to the barber.