question: Frances sells 20 cupcakes for $2 for each cupcake and  40  cookies at $1 each.  She buys five trays at $4 for each tray. How much money does Frances have left?
answer: 20 cupcakes cost 20 x $2 =$<<20*2=40>>40.
  40 cookies cost 40 x $1 = $<<40*1=40>>40.
  So, Frances earns $40 + $40 = $<<40+40=80>>80 for selling cupcakes and cookies.
  The cost of five trays is 5 x $4 = $<<5*4=20>>20.
  Therefore, France will have $80 - $20 = $<<80-20=60>>60 left.
  #### 60