Profit volume ratio

A company have the following data for the two years of its operations.
2013 2014
Sales K4,500,000 K5,400,000
Units sold 5,000 6,000
Margin of safety percent -30% -8.33%
Variable production costs K1,250,000 K1,500,000
Variable selling and distribution costs K250,000 K300,000
Required
a) Calculate P/V ratio (2 Marks)
b) Calculate fixed costs per year (5marks)
c) Calculate Break even point in sales value (5 Marks)
d) Calculate profits/losses for 2013 and 2014 (4 Marks)
e) Show that P/V ratio = Change in profit/Change in Sales (2 Marks)
f) Given that margin of safety is 30% for 2015,calculate profit for 2015 (3 marks)
g) Describe any four (4) limitations of CVP (4 Marks)(Total 25 Marks)