Answer:
This firm is experiencing Decreasing return to scale
Step-by-step explanation:
ATC = TC/Q
ATC (2,000) = $4,000/2000 unit = 2
ATC (2,300) = $4,100/2,300 unit = 1.78
ATC (2,600) = $4,200/2600 unit = 1.62
The ATC is decreasing, hence it is decreasing return to scale.