DIFFERENTIAL COST - The cost difference expected if one course of action is adopted instead of others.
There is a cost difference in the courses of action.
All courses of action can be taken.
A woman is inside.
Tuppence crawled into the grave.
Young people are so carefree that they hardly think at all!
An artist combs her hair.
Children are working on homework at the kitchen table.
The people are looking right at the camera.