Omitted Financial Statement Data For the following four unrelated situations, A through D, calculate the unknown amounts appearing in each column:

How yo get your figures is more important to me than the actual answer. I have several like this and have a quiz that allows me to check inputs but so far every attempt says the answer is wrong.

A B C D
Beginning
Assets $28,000 $12,000 $28,000 $(d)
Liabilities 18,600 5,000 19,000 9,000
Ending
Assets 30,100 26,900 34,000 40,000
Liabilities 17,300 (b) 15,000 19,000
During the year
Sales Revenue (a) 23,500 28,000 24,000
Expenses 8,500 21,000 11,000 17,000
Dividends 3,000 1,500 (c) 3,000