private NzEstimator()
{
//todo nz uses the same formula for now
LabourEstimator = new LabourCostEstimator();
PriceEstimator = new PriceEstimator();
}
private AusEstimator()
{
LabourEstimator = new LabourCostEstimator();
PriceEstimator = new PriceEstimator();
}