The Budget screen allows you to view analytical data very useful for controlling your industrial empire.
Total Budget Tab: Shows you the various sources of Income and Expenses you have throughout the game. You can sort the Total Income and Expenses or an itemized version based on the source of Income or Expense.
Total Sales Tab: Shows you the all of the Demand, Stored, Supplied, and total Sales of every Shop in every Town throughout the map. You can sort the information based on Town, Shop, or by the Product within the Shop.
Buildings Tab: Show you Production Efficiency and Cost of the Production buildings you have on the map. You can sort based on building type and specific buildings.