what is the commission for 4300 for 2000 in sales the commission is 120 i need help solving this question thank you for helping

I'm assuming that you're saying that $2000 worth of sales generates a commission of $120 and you want to know the commission for $4300 worth of sales...if so, we can solve this by a proportion

120 / 4000  = x / 4300   where x is the amount we're looking for   ...cross-multiply

4300*120  = 4000x   divide both sides by 4000

[4300 * 120] / 4000  = x  = $129