1.which of the formula s is used to calculate the contribution margin? 2. what Is the amount of direct materials used in August if 25000 dollars of raw materials were purchased during the month and inventories were balance inventories August 5000 August 31 is3000. work in process is 13000.and 16000.finished goods 25000.and 27000, A 27000,B 23000, c 16000,d 19000 choose correct one. 3.which cost will be included both as part of prime cost and as part of conversion cost? 4.rider company s product has a selling price of 40 per unit and variable expenses of 15 per unit, the company fixed expenses total 30000 per year, what is the company's break even point in terms of total dollar sales