You need to put a picture of the graph in the question and I can answer it.
Rate = 63.75/850=.075*100%= 7.5%
7.5% is Isabella's rate of commission.
825
Because when we did that we got
<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>attached</em><em> </em><em>picture</em><em>⤴</em>
<em>Hope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>