a) Mulunaushi Limited a company in Kabwe recorded the following data Month January February March April June July Activity level 1,800 Cost incurred (K) 37,500 42,300 39,650 38,100 37,350 38,750 2,200 1,850 February activity level is 1.40 times activity level of January July activity level is 150 more than activity level in January April activity level is 250 less than activity level of March Based on the data above. i. Calculate the variable cost per unit (2 marks) i. Estimate the total cost for the following levels of activity 2,890 units and 4,570 units (4 marks) im Calculate x y z (3 marks) b) State two benefits derived from use of pre-determined costs to management ip