Zone Company rendered services to customers amounting to $20,000 during 2012; the related cash was collected as follows: $16,000 in 2012, $4,000 in 2013. During 2012, $8,000 was incurred (and matched against 2012 revenue) for wages expense; the related cash payments were made as follows: $6,000 in 2012; in 2013 $2,000. Based only on these data, provide the following amounts: 16. Revenue to be recognized 2012: Revenue to be recognized for 213: Expense to be recognized 2012: 19. Expense to be recognized for 2013: 20. Wages payable to be recognized for 2012