Answer: $40
Explanation: Cost can be defined as the total resources of several forms used by the firm for the production of output. Cost can further be categorized into two parts fixed cost and variable cost. The cost that remains unchanged irrespective of the level of output is called fixed and the one that change with the level of output is called variable cost.
Therefore,
cost = fixed cost + variable cost
$175 = fixed cost + ($33.75 * 4 )
fixed cost = $175 - $135
= $40