public static void FillAggregates(this AggregateRow row, ICollection<EmployeeRow> employees)
{
row.EmployeeCount = employees.Count;
row.GrossPayAvg = employees.Average(e => e.GrossPay);
row.GrossPayMin = employees.Min(e => e.GrossPay);
row.GrossPayMax = employees.Max(e => e.GrossPay);
row.GrossPaySum = employees.Sum(e => e.GrossPay);
row.GrossPayMed = employees.Median(e => e.GrossPay);
row.SalaryAvg = employees.Average(e => e.Salary);
row.SalaryMin = employees.Min(e => e.Salary);
row.SalaryMax = employees.Max(e => e.Salary);
row.SalarySum = employees.Sum(e => e.Salary);
row.SalaryMed = employees.Median(e => e.Salary);
}
