Group the U$.$S$.,$ Canada, and Mexico worksheets.

In cell F$5,$ insert a formula using the SUM function that totals the Mini sales amounts for Quarters $1-4($range B$5$:$5).$

C$.$

Fill the range F$6$:$7$ with the formula in cell F$5$ to display the totals for the other types of portable speakers.

d$.$

Ungroup the worksheets and then check to confirm that all three worksheets reflect the changes you made in this step.