Average rate of returnnew product Oahu Inc. is considering an investment in new equipment that will be used to manufacture a smartphone. The phone is expected to generate additional annual sales of 4,300 units at $314 per unit. The equipment has a cost of $439,900, residual value of $33,100, and an 8-year life. The equipment can only be used to manufacture the phone. The cost to manufacture the phone follows: Line Item Description Amount Cost per unit: Direct labor $52.00 Direct materials 202.00 Factory overhead (including depreciation) 35.25 Total cost per unit $289.25 Determine the average rate of return on the equipment. If required, round to the nearest whole