please answer the yellow boxes

Jay Corporation has provided data from a two-year period to aid in planning. The Controller has asked you to prepare a contribution format income statement. Use the information included in the Excel Simulation and the Excel functions described below to complete the task. - Cell Reference; Allows you to refer to data from another cell in the worksheet. From the Excel Simulation below, if in a blank cell, "B4" was entered, the formula would output the result from cell 84 , or 17,000 in this example. - Basic Math functions: Allows you to use the basic math symbols to perform mathematical functions. You can use the following keys: + (plus sign to add). - (minus sign to subtract). "(asterisk sign to multiply), and / (forward siash to divide). From the Excel Simulation below, if in a blank cell "= B19+820 " was entered, the formula would add the values from those cells and output the result, or 183.800 in this example. If using the other math symbols the result would output an appropriate answer for its function. - SUM function: Alows you to refer to multiple celis and adds all the values. You can add individual cell references or ranges to utilize this function. From the Excel Simulation below, if in a blank cell ". SUM(C18,C19,C20)" was entered, the formula would output the fesult of adding those three separate cells, or 47,300 in this example. Similarly, if in a blank cell "in SUM(C18:C2O)" was entered, the formula would output the same result of adding those cells, except they are expressed as a range in the formula, and the result would be 47,300 in this example