If you wanted a new pair of shoes during the Civil War, you traced the outline of your foot on a piece of paper and gave it to a shoemaker. There was no distinction between the right and left foot because you wanted your shoes as quickly as possible, and the shoemaker knew that you would buy them even if they just "sort of" fit. This is an example of a transaction that would have occurred during the ________ era in U.S. business history.