Match the cost behavior that is described with the proper cost type. The unit cost of an item is $30 per unit when activity is 10,000 units and $15 per unit when activity is 20,000 units. The total cost of an item is $30,000 when activity is 10,000 units and $30,000 when activity is 20,000 units. The total cost of an item is $30,000 when activity is 10,000 units and $50,000 when activity is 20,000 units. 1. Variable cost 2. Fixed Cost The unit cost of an item is $30 per unit when activity is 10,000 units and $20 per unit when activity is 20,000 units 3. Mixed Cost The total cost of an item is $30,000 when activity is 10,000 units and $60,000 when activity is 20,000 units. The unit cost of an item is $30 per unit when activity is 10,000 units and $30 per unit when activity is 20,000 units