HELP! I need answers to these 4 questions ASAP!!!!

1 Really Fast Delivery Services has the collected the following information about operating expenditures for its delivery truck fleet for the past five years: Year Miles Operating Costs 2009 110,000 $390,000 2010 140,000 $420,000 2011 100,000 $360,000 2012 130,000 $410,000 2013 170,000 $450,000 Using the highlow method, what is the cost estimate for fixed costs for 2014? $200,000 $140,000 $210,000 $230,700 Using the highlow method, what is the cost estimate for variable costs for 2014? $1.29 $2.00 $1.60 $1.50 2. The graph of an estimated cost represented by cost equation, Y = a + bX, would be best described by which of the following descriptions: A positive slope starting at the point of origin A positive slope starting at the yintercept A horizontal line starting at the yintercept A negative slope starting at the yintercept 3 Stephen Company sells a single product. The product has a selling price of $45 per unit and variable expenses of $15 per unit. The company's fixed expenses total $30,000 per year. The company's break-even point in terms of total sales dollars is: $100,000 $ 45,000 $ 60,000 $ 48,000