Isn’t all change “exact change”? How would you get hold of an “approximately thirty cents” piece? And if someone handed you one, how would you make change? “Let’s see: roughly sixty-five cents minus thirty-four cents makes just about thirty-one cents. Sorry — I have a somewhere-around-seventy-nine cent piece, but all I have for small change is exact amounts.”
Brought to you by the “recently spent thirty hours driving, many of them on toll roads” department.