Pharoah Corporation sells a single product for $50. Its management estimates the following revenues and costs for the year 2022: Net sales $560,000 Selling expensesvariable $22,400 Direct materials 100,800 Selling expensesfixed 22,400 Direct labour 67,200 Administrative expensesvariable 11,200 Manufacturing overheadvariable 22,400 Administrative expensesfixed 11,200 Manufacturing overheadfixed 33,600 Assume the price remains at $50 per unit and variable costs remain the same per unit, but fixed costs increase by 20% annually.

Calculate the percentage increase in unit sales required to achieve the same level of annual operating income calculated in part second part. (Round answer to 2 decimal places, e.g. 15.25%.)