Chen makes and sells cups of coffee from a market stall. The coffee is sold for 2.20 per cup. The only fixed cost is the stall rental, which is 50 a day. The variable costs of producing and selling one cup of coffee are 1.25. How many cups of coffee does Chen need to make and sell in order to make a profit of 100 in a day? 68 Cups 105 Cups 157 Cups 158 Cups