1.3 John has a lemonade stand and he sells lemonade in his neighbourhood. His business has a fixed cost of R200 per month and it costs him R1.50 to produce a glass of lemonade. John decided to sell each glass of lemonade for R3.00. Calculate the following: 1.3.1 Break-even volume per month (4) 1.3.2 How many glasses of lemonade does John need to sell in order to make a profit? (2) 1.3.3 The increase in profit if the monthly sales of 750 units is increased by 10%. (6)