Total contribution margin = $105,000
 Units = 30,000
 Fixed cost = $40,000
 Operating income for 28,000 units = ?
 Contribution margin per unit = $105,000 / 30,000
 = $3.50
 Then budgeted operating income for 28,000 units = ($3.50 x 28,000) - $40,000
 = 98,000 – 40,000
 = $58,000
 So, the budgeted operating income for 28,000 units would be $58,000.