i have the answers i wanna know how they find it , can i explain details please

Total Assets Liabilities: Accounts Payable Salaries Payable Bonds Payable Total Liabilities \begin{tabular}{lll} $168,000 & $171,000 \\ \hline \end{tabular} $(3,000) Equity: Common Stock Retained Earnings Total Equity 50037,50038,000 (4,000)(4,000) Total Liabilities and Stockholder's Equity \begin{tabular}{l} $168,000$171,000 \\ \hline \end{tabular} (3,000) Revenues Expenses: Cost of Goods Sold Salaries Depreciation Expense - Vehicles Depreciation Expense - Equipment Rent Expense Gain on Sale of Vehicle Loss on Sale of Equipment Net Income Assets: Cash Accounts Receivable Inventory Equipment Accum. Depr - Equipment Vehicles Accum. Depr - Vehicles Total Assets $175,000 \begin{tabular}{cc} & (95,000) \\ & (28,000) \\ & (6,000) \\ & (3,000) \\ & (7,000) \\ I2,000 \\ & (4,000) \\ \hline$34,000 \\ \hline \end{tabular} \begin{tabular}{cc} & 2020 \\ \hline$ & 82,000 \\ & 52,000 \\ & 28,000 \\ & 38,000 \\ & (28,000) \\ & 30,000 \\ & (34,000) \\ \hline$ & 168,000 \\ \hline \end{tabular} Change \begin{tabular}{cc} \hline$ & 14,000 \\ & 4,000 \\ & (1,000) \\ & (30,000) \\ & 22,000 \\ & (42,000) \\ & 30,000 \\ \hline$ & (3,000) \\ \hline \end{tabular} Hnriznntal nalucic Solutinn