We can start off by putting this into an equation. Kalil's monthly salary is not a changing value, so that stays put. However, any additional money he gets from selling his stuff, he gets to keep 1.4%.
Thus, we can just add his salary and his commission earnings.
To find the commission, we just multiply 1.4% by $51,000 (the total sales, not his salary).
[tex]3250 + 51000(0.014) = 3964[/tex]
Thus, Kalil got $3964 in July.
