message: Updated FactoryProduction to call the stand-alone function for product cost.
diff: @@ -111,7 +111,7 @@ void FactoryProduction::productSelectionChanged(const IconGrid::IconGridItem* _i
  }
  mProduct = static_cast<ProductType>(_item->meta);
  - mProductCost = mFactory->productCost(mProduct);
  + mProductCost = productCost(mProduct);
  }
  @@ -203,7 +203,7 @@ void FactoryProduction::factory(Factory* _f)
  else { mProductGrid.selection_meta(static_cast<int>(mFactory->productType())); }
  mProduct = mFactory->productType();
  - mProductCost = mFactory->productCost(mFactory->productType());
  + mProductCost = productCost(mFactory->productType());
  }
  