On Windows 10, the $WINDOWS.~BT folder contains your previous Windows installation. These files are used to downgrade to a previous version of Windows, or a previous build of Windows 10.
Aggregate Demand and Supply. The macroeconomic model for Aggregate Demand and Aggregate Supply differs from the microeconomic model in the fact that the AD/AS model represents all goods and not just one single good. It takes into account the price level of all goods as well as the overall aggregate output of the economy. Aggregate Demand (AD) represents the demand side of the economy. Long-run Aggregate Supply (LAS) represents the most output that an economy can sustain. Short-run Aggregate Supply (SAS) represents the supply of the economy in the short run.
An Increase in the Quantity Supplied. The Quantity Supplied is an amount at a given price while Supply is the entire relationship between the various Quantities Supplied at a variety of prices. When the price increases from P1 to P2, the quantity supplied increases from Q1 to Q2. Changing the price leads to changes in the quantity supplied. Paying extra for overtime is a way to increase the quantity supplied. Supply is the relationship between Prices and Quantities Supplied.