Answer:
Increase by $4,000
Step-by-step explanation:
Increase in sales = 200 x 25% = 50
Total sales after change = 200+50 = 250
New Contribution = $80 x 250 = $20,000
Old Contribution = $80 x 200 = $16,000
change in contribution $20,000 - $16,000 = $4,000