PPP proposes to invest $10 million in a new calculator factory. Fixed costs are $3 million a year. A calculator costs $9 per unit to manufacture and can be sold for $26 per unit. The factory lasts for 5 years and the cost of capital is 20%. Assume no taxes, all cash flows arrive at the year-ends and the residual value of assets is zero after 5 years. What is the NPV break-even level of annual units of sales? Select one: O a. 217,565 units. O b.439,518 units. O C. 373,165 units. O d. 350,288 units