a. The number of units (x) and their associated direct labour cost (y) in Kshs. are given below: Number of units (x) 15 12 20 17 12 25 22 9 18 30 Direct labour cost (y) 18 0 140 230 190 160 300 270 110 240 320 Required: i. ii. Use the high-low method to determine the direct labour cost estimation function (4 Marks) Determine the cost estimation equation using the linear regression method (7 Marks) Use the methods in (a) and (b) function above to estimate the direct labour cost when number of units x = 40 (2 Marks) B. Assume that the beginning work in progress in Arusha Company Ltd in the month of November was 1,200 units which were 100% complete in terms of materials and 75% complete as to conversion. Raw materials costs relating to beginning work in progress amounted to shs.3,000 and conversion was shs. 1,500. 10,000 units were completed during the period and transferred to finished goods stock a/c. 2,000 units were still in process and were 100% complete in relation to materials and 50% complete in relation to conversion costs. Costs incurred during the period were raw materials shs.40,000, conversion shs.73,000; Required Use both weighted average and FIFO methods, to determine cost per equivalent unit and value of ending inventory. Prepare the process cost report.