The Sands Corporation produces packaged sandwiches. In a recent budget performance report, there was an unfavorable quantity variance related to cheese. How many of the following could help explain the variance? The selling price of sandwiches was decreased. Labor union contract disputes led to increased wages for all factory workers. An automated cheese slicer was installed at the factory. The factory manager started purchasing similar cheese from a lower cost supplier. 3 0 4 I 2