You are planning to run a hot dog stand during a forthcoming fair. You originally estimated that you will generated sales revenue of Rs 2000 and you have already spent Rs 1000 building the hot dog stand. The hot dog stand is nearly completed but now you estimate total sales to be only Rs 800 because the fair clashes with a major music festival in a nearby location. You can complete the hot dog stand for another Rs 300 Your decision rule should be to complete the hot dog stand as long as the cost to complete the stand is less than?