Answer: $30
Step-by-step explanation:
Given that,
Average variable cost (AVC) = $25
Average fixed cost (AFC) = $5
Marginal cost (MC) = $30
Average total cost (ATC) = Average fixed cost (AFC) + Average variable cost (AVC)
= $5 + $25
= $30
Therefore, average total cost is the sum of average fixed cost and average variable cost. Alternatively, average total cost is calculated by dividing total cost to units of output produced.