USE Corp. has identified the following costs at different activity levels for CONCRETE for their manufacturing facility: Units Produced CONCRETE cost 2.500 S 425.000 3.750 S 625.000 4.500 3 7220.000 5.000 S 7'92.500 6.250 S 98?.500 The business managers are interested in predicting the costs at different activity levels and have asked for guidance. PART A (5 Marks) Using the high-low method. calculate the xed component of the CONCRETE cost PART B (3 Marks) Develop a cost equation for the CONCRETE cost for CBS Corp. PART C (1 Mark) Describe what a mixed cost is and explain the nature of mixed costs and variable costs as seen in this