This job activity can easily be adapted and changed in difficulty. I have used this in all high school grades and classes.
Here is the scenario:
A friend of yours interviewed for two different sales positions in competing companies. Stellar Sales pays $500 per week plus 10% commission on the total dollars each individual sells per week. Lunar TeleSales pays $200 per week but offers a 20% commission on the total dollars each individual sells per week. Sales at both companies are seasonal.
The students will work through the problem and all the details as they uncover the jobs and their sales.