SOLUTION: A person has two choices for his salary. Plan A. A salary of $900 per month plus a commission of 10% of sales OR Plan B A salary of $1,200 per month plus a commission of 15%

Question 524176: A person has two choices for his salary. Plan A. A salary of $900 per month plus a commission of 10% of sales OR Plan B A salary of $1,200 per month plus a commission of 15% of sales in excess of $8,000. For what amount of monthly sales is plan B better than plan A?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Plan A 900 + 0.1*x
Plan B 1200 + 0.15(x-8000)
Plan B < Plan A
1200+0.15(x-8000)<900+0.1x
1200+0.15x-1200<900+0.1x
0.15x-0.1x<900
0.05x<900
x<18000
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