Answer: 42.50
Step-by-step explanation: sale price is the price at which something sells or is sold at after its price has been reduced
This gives you the answer, look at it tells you how to solve this and get your answer
I'm pretty sure the answer is 4 because, 4*21= 84.
I decided to do a addition problem because based on the answer it couldn't be multiplication, subtraction, or division. Therefore, my problem would look like 15+9=24 birds in total.