What is a real variable in economics?

What is Short run AND long run demand? What is the economic function of profits and losses? Definition of producer surplus? How to calculate cost of preference shares? Which of these is the constant movement of the gross national product around its trend to expand and contract? What factors contribute to the long-term demand for durable goods in the field of economics"? What role did carnegie have on free enterprise? Do ethics have no place in business? What is the corporate responsibility? What is the relationship between start-up costs and competitive market? Who determines what is produced in a traditional economy? Which demand can become more elastic over time what changes can take place in the long term to affect demand? Why do work roles in a traditional economy tend to be limited? What are the benefits of being a wise consumer? What is the average price of club steak per pound? What are the effects of excess labor supply? Why the specialisation of labor is more efficient than universal self sufficiency? How does off-peak pricing influence demand for services? What is the Cause of demand pull-inflation? What do the free entrerpise system allows individuals to pure?