Day 23 - Employee with Highest 2021 Sales

23 - Employee w/ Highest 2021 Sales = 
VAR _EmpsWithSales =
    ADDCOLUMNS (
        SUMMARIZE ( Employees, Employees[EmployeeID], Employees[Full Name] ),
        "@Sales", CALCULATE ( [Total sales], 'Calendar'[Year] = 2021 )
    )
VAR _TopEmp =
    TOPN ( 1, _EmpsWithSales, [@Sales], DESC )
VAR _TopName =
    SELECTCOLUMNS ( _TopEmp, "Name", [Full Name] )
RETURN
    _TopName