What information to make a good decision?

Management Case 4 Tomas Lopez operates a 24-hour burges station along Roxas Boulevard Two other burger stations are located within the area. Since business is becoming highly competitive, Tomas plans to reduce the price of his burgers by 5% and increase sales volume by 20%. This way he hopes to increase his net income substantially Tom's burgers sell at P 25.00 each. The following is a summary report of the operations of Tom's burger station for the past two years Net Sales Cost of Sales Gross Profit Operating expenses Net income This Year Last Year P 912.500 787.500 S47500 409.500 P 365,000 378,000 228 125 220.500 P 136875 157500 You have been asked to help Tom arrive at a decision. Other than the data provided above, what other additional information will Tom need for him to make a good decision