Ezra runs a gyro stall at the local farmers' market. he would like to expand and open his own shop downtown. he has made the chart above, listing some potential costs and benefits of expansion. if ezra decides not to expand, what will be an opportunity cost of his choice?

After the 2008 recession, the amount of reserves in the us banking system increased. because of federal reserve actions, required reserves increased from $44 billion to $60 billion. however, banks started holding more reserves than required. by january 2009, banks were holding $900 billion in excess reserves. the federal reserve started paying interest on the excess reserves that the banks held. what possible impact will these unused reserves have on the economy?