I'm having complications with this relevant range exercise.

Erkkila Inc. reports that at an activity level of 6,700 machine-hours in a month, its total variable inspection cost is $426,380 and its total fixed inspection cost is $192.780. What would be the average fixed inspection cost per unit at an activity level of 7,000 machine-hours in a month? Assume that this level of activity is within the relevant range. $27.54 $92.41 $28.77 $34.87