Please help me solve this problem. Here is the complete question below.

4. At an activity level of 9,900 machine-hours In a month, Curt Corporation's total variable production engineering cost is $882,090 and its total fixed production engineering cost is $196,000. What would be the total production engineering cost per machine-hour, both fixed and variable, at an activity level of 10,000 machine-hours In a month? Assume that this level of activity is within the relevant range. (Do not round intermediate calculations.) O $108.88 O $108.35 $107.81 O $108.70