3. Cole Co. plans to sell 12,000 units per month. The estimated units costs for Cole Co. are as follows: Estimated Cost Item Unit Cost Direct materials $32 Direct labor 20 Variable manufacturing overhead 15 Fixed manufacturing overhead 6 Variable selling 3 Fixed selling 4 a. What is Cole's estimated total variable costs per unit? 70 b. Suppose Cole estimates to produce 12,000 units and sell 8,000 units during a month. What are Cole's estimated total costs