Answer:
Above $4375, commission would give him more money.
Explanation:
Shawn has two salary options.
He can either receive a fixed salary of $750.00 per week sales or a salary of $400.00 per week plus an 8% commission of his weekly sales.
Let the sales be represented by y. We get the following equation to check when both gets equal.

=>

=>

y = 4375
y = $4375. At this much sales amount, either salary or commission would be the same.
Above $4375, commission would give him more money.