Under SalesSummary

$$In the Calculations Area, add $$Count$$ of OrderID

$$In the Calculations Area, add $$Average$$ of Sales

$$In the Calculations Area, add $$Max$$ of Total

$$In the Calculations Area, add $$Distinct Count$$ of Department

$$Under MonthNames

$$Change the Data Type of MonthID to Text

$$Save the file. Change the name and save as Introducingyourname.xlsx