Answer:
He earns $296780 as a Sales Trainee and $377094 as a Sales Associate
Step-by-step explanation:
Given
Let x represents his sales as a sales trainee
Let x represents his sales as a sales associate
Total Sales:

Total Commission:

Required
Find x and y
Equations
--- (1)
--- (2)
Make y the subject of formula in (1)


Substitute this in (2)


Open Bracket

Collect Like Terms


Divide through by -0.03


Recall that



Hence;
He earns $296780 as a Sales Trainee and $377094 as a Sales Associate