At an activity level of 4,700 units in a month, Zelinski Corporation's total variable maintenance and repair cost is $336,050 and its total fixed maintenance and repair cost is $100,110. What would be the total maintenance and repair cost, both fixed and variable, at an activity level of 4,900 units in a month? Assume that this level of activity is within the relevant range.

$436,160

$454,720

$450,460

$445,440