4. The income from operations and the amount of invested assets in each division of Beck Industries are as follows: Division Retail Division Commercial Division Internet Division Income from Operations Invested Assets $5,500,000 $30,000,000 6,750,000 23,000,000 1,500,000 12,000,000 a. Compute the return on investment for each division. b. Which division is the most profitable per dollar invested? 6. Materials used by the Instrument Division of XPort Industries are currently purchased from outside suppliers at a cost of $220 per unit. However, the same materials are available from the Components Division. The Components Division has unused capacity and can produce the materials needed by the Instrument Division at a variable cost of $165 per unit. If a transfer price of $190 per unit is established and 60,000 units of materials are transferred, with no reduction in the Components Division's current sales, how much would XPort Industries' total income from operations increase? b. How much would the Instrument Division's income from operations increase? C. How much would the Components Division's income from operations increase