"Naomi and Kaito have more string instruments than any other type. Naomi wants to summarize the string instrument data using subtotals to show the value of each type. Switch to the Strings worksheet and add subtotals as follows:

a$.$ Sort the table by the Instrument field in ascending order.

b$.$ Convert the table to a normal range.

c$.$ Insert subtotals into the range B$2$:G$12,$ with the subtotals appearing at each change in the Instrument column value. The subtotals should use the SUM function and include subtotals for the Price and Est. Value fields."