in december​ 2009, currency was​ $400 billion,​ traveler's checks were​ $5 billion; checkable deposits owned by individuals and businesses were​ $600 billion, saving deposits were​ $2,00 billion, time deposits were​ $1,500 billion; and money market funds were​ $1,200 billion. what was the m1 in december​ 2009?