Urban Auto Glass specializes in the repair and replacement of windshields for passenger vehicles. Variable and fixed costs related to installation activities for the most recent month (July) are listed below Item Number of windshields installed 2,050 Variable expenses $420,250 65,600 26,650 Direct materials Direct labour (1 hour per installation) Indirect materials Fixed expenses Installation supervisor's wages Installation scheduler's wages Warehouse expenses $ 12,300 6,150 14,350 Requirea: 1. Calculate the per unit amounts for each of the variable expense and fixed expense items in July Per Unit Variable expenses Direct materials Direct labour (1 hour per installation) Indirect materials Fixed expenses Installation supervisor's wages Installation scheduler's wages Warehouse expenses