Avery Company has two divisions, Polk and Bishop. Polk produces an item that Bishop could use in its production. Bishop currently is purchasing 26,000 units from an outside supplier for $15 per unit. Polk is currently operating at less than its full capacity of 620,000 units and has variable costs of $6 per unit. The full cost to manufacture the unit is $10. Polk currently sells 440,000 units at a selling price of $19 per unit. a. What will be the effect on Avery Companys operating profit if the transfer is made internally? b. What is the minimum transfer price from Polks perspective? c. What is the maximum transfer price from Bishops perspective?