Answer the question on the basis of the following cost data for a purely competitive seller:
Total Product TFC TVC
0 $100 $0
1 100 70
2 100 110
3 100 185
4 100 260
5 100 350
6 100 450
Refer to the data. If the product price is $80, at its optimal output will the firm realize an economic profit, break even, or incur an economic loss? How much will the profit or loss be? Show all calculations.