If an orange seller bought 5 dozen oranges at the rate of tk.60 per four and sold them at the rate of tk50 per four, how much did he lose

tk 30

Step-by-step explanation:

5 dozen = 5 * 12 = 60 oranges

12/4 = 3

total cost = 60 * 3 = tk.180

total sell = 50 * 3 = tk 150

total lose = 180 - 150 = tk 30

what is all that apply?