Answer:
The managers predicted total costs for 3500 birdcages will be $74640.
Step-by-step explanation:
Average cost = Total cost/Total units
total costs = (22*2500)
= $55000
variable costs = (55000 - 5900)
= $49100
variable cost/unit = (49100/2500)
= $19.64/unit
total cost for 3500 birdcages = 5900 + (19.64*3500)
= $74640
Therefore, The managers predicted total costs for 3500 birdcages will be $74640.