Answer:
1. Effect on Income = Additional Order*(Purchase Price - (Direct Material + Direct Labor + Variable Overhead))
Effect on Income = 60,000*(150 - (50+35+30))
Effect on Income = 60,000*(150 - 115)
Effect on Income = 60,000 units * $35
Effect on Income = $2,100,000
Net Income would increase by $2,100,000
2. Drop in Sales = Increase in Net Income/(Normal Sales Price - Total Variable Costs)
Drop in Sales = $2,100,000/(180 - 115)
Drop in Sales = $2,100,000/65
Drop in Sales = 32307.69231
Drop in Sales = $32,307.69