My courses MANAGERIAL ACCOUNTING mam 13/6/2021 (2 pm-3pm) Time left 0:24:49 of At an activity level of 4,400 units in a month, Goldbach Corporation's total variable maintenance and repair cost is $313,632 and its total fixed maintenance and repair cost is $93,104. What would be the total maintenance and repair cost, both fixed and variable, at an activity level of 4,800 units in a month? Assume that this level of activity is within the relevant range. a. $428,120 O b. $406,736 O c. $735,248 O d. $420,992 Clear my choice