C#

Robert Rohde wrote:

can afford to spend some money on it then here[^].

for (int i = Controls.Count - 1; i >= 0; i--) {
   if (Controls[i] is Label)
      Controls.Remove(Controls[i]);
}

augie0216 wrote:

a commissions rate field required by the class constructor

public class AutoSalesperson
{
    private double totalValueNum = 0;
    private double commissionEarnedNum = 0;
    private double commissionRateNum;

    public AutoSalesperson(double commissionRateNum)
    {
        this.commissionRateNum = commissionRateNum;
    }
}