public string Formula()
{
string formula = "";
int offset = Coefficients.GetLowerBound(0) - VariableNames.GetLowerBound(0);
for (int i = Coefficients.GetLowerBound(0); i < Coefficients.GetUpperBound(0); i++)
{
formula += "(" + Coefficients[i].ToString("0.0000") + " * " + ExcelHelpers.CreateValidFormulaName(VariableNames[i - offset]) + ") + ";
// formula += "(" + Coefficients[i].ToString() + " * " + ExcelHelpers.CreateValidFormulaName(VariableNames[i - offset]) + ") + ";
}
formula += Coefficients[Coefficients.GetUpperBound(0)].ToString("0.00");
return(formula);
}