Answer: $700 Favorable
Explanation:
Total sales-volume variance = (Actual units - Static budget units) * (Contribution margin per unit of Static budget)
Contribution margin per unit of Static budget = ( Sales - Variable manufacturing costs - Variable marketing and administrative expenses) / Static units
= (60,000 - 15,000 - 10,000) / 5,000
= $7 per unit
Sales-volume variance = (5,100 - 5,000) * 7
= $700 Favorable
Actual sales are higher than budgeted sales so this is FAVORABLE.