Question 11280
Each sale brings in $14
Total cost = 2000+10X
If X cassettes are made and sold,14X is the revenue.To break even,amount spent must equal amount coming in due to sales

14X= 2000+10X
Subtracting 10X on both sides
4X =2000
X = 500 meanin 500 cassettes are to be made and sold to break even