Annie bought one dozen smartphones for P200,000.00 with a discount of 5%. She sold half dozen at a price of P18,000.00 per unit. However, a new model of smartphone became available in the market, so...

Annie bought one dozen smartphones for P200,000.00 with a discount of 5%.
She sold half dozen at a price of P18,000.00 per unit. However, a new model
of smartphone became available in the market, so she sold the remaining half
dozen @ P12,000.00 each unit. What was her profit or loss?


Compute the following requirements:


a. Gross profit rate
b. Operating profit margin rate
c. Net profit margin rate
d. Return on Investment​