High-Low and Cost Formula Adams Company has accumulated the following total manufacturing overhead costs for two levels of activity (within the relevant range Low High Activity (direct labor hours) 30,000 50,000 Total manufacturing overhead $675,000 $905,000 The total overhead cost includes variable, fixed, and mixed costs. At 50,000 direct labor hours, the total cost breakdown is as follows: Variable cost $500,000 Fixed cost 225.000 Semi-mixed cost $180,000 a. Using the high-low method of cost analysis, determine the variable portion of the semi-variable cost per direct labor hour. Determine the total fixed cost component of the mixed COSL Isolate mixed costs: Do not use negative signs with your answers. Low High Total cost $ Less: Variable cost Fixed cost Total mixed cost High-Low Analysis: Round variable portion per unit to two decimal places, if applicable. Direct Labor Hours Total Mixed Cost . Variable Portion - Fixed Portion DS 0 $ Low Difference Variable portion per unit $ 0