If the company wants to achieve a residual income of P40,000 using an imputed interest charge of 15%, what will be the selling price per unit of 20,000 units sold ; where its costs and expenses totaled P250,000, working capital used totaled P300,000 and PPE-net amounted to P100,000.

a. 15.50

b. 35.00

c. 17.50

d. 5.00