The expression can be written as the inequality:
300+0.05s≥500
300$ is made per week, so we start off with
300
He also makes 5% or 0.05 from his sales, so we add in the expression 0.05x (where s is equal to his sales volume for the week)
300+0.05s
If he wants to make at least 500$ weekly, then the total of the base salary plus the commission has to be 'greater than or equal to 500.
300+0.05s≥500
Lets solve for s now...
300+0.05s≥500
subtract 300 from both sides
0.05s≥200
Divide both sides by 0.05
s≥4000
