Retailers in Waco have traditionally generated revenue through the sale of merchandise. This involves purchasing goods and then selling them at a higher price than the initial cost.

For a long time, this method has been the primary means by which retailers have made money. The specifics of how this model works can be found in the Waco Tribune-Herald.

Further information on the topic is available from the Waco Tribune-Herald, which may provide additional details on the retail industry and its practices.