Please help

For the following four unrelated situations, A through D, calculate the unknown amounts appearing in each column: A Beginning Assets $45,000 $32,000 $53,000 Liabilities 32,000 15,000 49,000 Ending Assets 50,000 Liabilities 22,000 During Year Sales Revenue (a) Expenses 12,000 Dividends 2,000 (a)$