XV. In 2012, Dr. K decided to return to his hometown to start his own practice. At the end of 2012, Dr. K found that he earned gross professional income in the amount of P1,000,000.00; while he incurred expenses amounting to P560,000.00 constituting mostly of his office space rent, utilities, and miscellaneous expenses related to his medical practice. However, to Dr. K's dismay, only P320,000.00 of his expenses were duly covered by receipts. What are the options available for Dr. K so he could maximize the deductions from his gross income? (3%)