was reduced to 4%. Corn was used as a standard, with 12 pounds of corn being exchangeable with one hour of labor. The result of the system was that no one was able to profit from the labor of another — every individual ostensibly received the "full produce" of his labor. Adjustments were made for the difficulty and disagreeableness of the work performed, so that time was not the only factor taken into consideration. Warren also set up boards on the wall where individuals could post what kind of services they were seeking or had to sell so that others could respond, and trade among each other using labor notes. After a rough initial period, the store proved to be very successful. Warren's goods were much cheaper than competitors', though he maintained that he was not trying to put other stores out of business. Another store in the neighborhood converted to Warren's methods. The fact that prices for goods rose the more time a customer spent with Warren resulted in very efficient transactions. Warren said that he was doing more business in one hour than normal businesses do in one day, leading him to close shop part of the day to rest. Though the store was successful, the problem of equal labor times for different difficulties of work was a concern for Warren. He was never able to reconcile the objectivity of his "labor for labor" prescription treating all labor as essentially fungible goods with the subjectivity employed in determining how much time used for one type labor entailed the same amount of work exerted during a different amount of time performing another type of labor. He settled to simply credit it with being a matter of individual judgment. Warren closed the store in May 1830 in order to depart to set up colonies based upon the labor-cost principle (the most successful of these being "Utopia"), convinced that the store was a successful experiment in "Cost the limit of price." In fact, the store became Cincinnati's most popular at the time. As Cincinnati librarian Steve Kemple noted: When the advantages of the store became known and its method understood, it was the most popular mercantile institution in the city. The people called it the “Time Store,” not because it gave credit or sold goods on installments, but on account of the peculiar and original method adopted to fix and regulate