Cells Editing M N 0 P < Task Instructions In cell B7, create a formula using external and internal worksheet references, that subtracts cell B9 on the Expenses worksheet of the PB Expenses.xlsx file, from cell B5 on the Income Statement worksheet of the PB Financials.xlsx file. 10:38 AM 1/1/2020 4) ENG 10:38 AM 8/14/2020 4