Question 6 (6 points) The following data relate to the overhead expenditure of Sparkly cleaners (for industrial cleaning) at two activity levels. Square metres 25,500 30,500 cleaned Cleaning cost $147,900 $167, 100 Required: Using the high-low method calculate the estimated total cost if 28,400 square metres are to be industrially cleaned. You answer should show the variable cost and fixed cost calculation including the cost formula