Erkkila incorporated reports that at an activity level of 2,100 machine-hours in a month, its total variable inspection cost is $69,846 and its total fixed inspection cost is" $9,072. What would be the average fixed inspection cost per unit at an activity level of 2,400 machine-hours in a month? Assume that this level of activity is within the relevant range. Mutiple Cholce $15.23 $37.58 $3.78 5432