Before you updated lvana with the results of your previous analysis, Ivana emails you with a few additional questions. Unfortunately, your colleague who is a Tablezu expert is on vacation and unable to provide you with guidance for the follow$-$up analysis. Address each of the following additional questions posed by lvana:

$15.$ Wana: "I want to make sure we treat our bigsest customers the best, as it is vital we do not lose their business. I might consider offering discounts to our best customers in the future. Who is our biggest customer $($in terms of sales revenue$),$ and what is the total revenue from that customer so far? Also, what is the total gross profit from that customer?" Open a new sheet and create a graph or graphs to show the answers $($make sure to name these graphs appropriately$)$

$16.$ "I want to make sure my best sales representatives are rewarded. Since lvana's Ice Cream opened, I have been paying my sales representatives a flat rate, but il need to start paving them based on their production levels. Who sold the most units in September $2016?$ How many units did that sales representative sell?" Open a new sheet and create a graph or graphs to show the answers $($make sure to name these graphs appropriately$)$