Oohu 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 5,400 units at $186 per unit. The equipment has a cost of $552,400, residual value of $41,600, and an 8 -year life. The equipment can only be used to manufacture the phone, The cost to manulacture the phone follows: Determine the average rate of return on the equipment. If required, round to the nearest whole percent. s Foectorar Trow My Wok Divide the estimated average annual income by the average investment. Sales price units sold, less unit cost units sold, equals average annual income