In cell B$23,$ Darius wants to display the profit margin for substations, which is contained in another worksheet.

Create a formula using an external reference as follows to include the profit margin:

a$.$ Open the workbook Support$\_$EX$365\_2021\_11$a$\_$Substations.xIsx.

b$.$ In cell B$23$ of the Tampa worksheet, insert a formula that references cell B$6$ in the Support$\_$EX$365\_2021\_11$a$\_$Substations.xIsx workbook.

c$.$ Close the Support$\_$EX$365\_2021\_11$a$\_$Substations.xlsx workbook.