Answer: 2 Dogs
Step-by-step explanation: The other dog never left the park
5*2x is 10x
5*3y is 15y
5*5z is 25z
B = F / (S-C)
B - breaking point in units
F - fixed costs, S - selling price, C - cost per racket.
S-C is the profit on a single unit
B = 740000 / (77.59 - 39.72) = 19540.53
The breaking point is approached after selling 19541 units.