I need help answering the bottom portion of the questions. I am having a hard time with this. Can you please assist me with this? Thank you

Sales	$12,011		$12,012		$12,013		$12,014
Cost of goods sold	3,011		3,012		3,013		3,014
Gross margin	$9,000		$9,000		$9,000		$9,000
Other expenses	$6,201		$6,201		$6,201		$6,201
Profit before taxes	2,799		2,799		2,799		2,799
Tax Expense	1,120		1,120		1,120		1,120
Net Income	$1,679		$1,680		$1,681		$1,682
In the space below, please describe the basic accounting equation you applied in making your calculations
Year 1 Gross margin
Year 1 Tax Expense
Year 2 Sales
Year 2 Profit before taxes
Year 3 Cost of goods sold
Year 3 Other expenses
Year 4 Cost of goods sold
Year 4 Gross Margin
Year 4 Other expenses
Year 4 Profit before taxes
Year 4 Tax Expense
Year 4 Net Income