16 At an activity level of 6,900 units in a month, Zelinski Corporation's total variable maintenance and repair cost is $408 756 and its total fixed maintenance and repair cost is $230,253 What would be the total maintenance and repair cost, both fixed and variable, at an activity level of 7100 units in a month? Assume that this level of activity is within the relevant range. O $639009 O $657531 O $650.857 O $648.270