private void CalculateCPM()
{
int index = ActivityComboBox.SelectedIndex;
double activity = activityTab[index];
ushort cPM = Calculators.CPMCalculator((ushort)HeightNumericUpDown.Value, (double)WeightNumericUpDown.Value, (byte)AgeNumericUpDown.Value,
SexComboBox.Text, activity, ReductionCheckBox.Checked);
CPMValueLabel.Text = cPM.ToString("F0");
}