$(2$ points$).$ What is the value of each converted user for the display ad campaign? $($Hint: what is the profit margin for each conversion?$)$

$(4$ points$).$ Please estimate how many of consumers purchased the new handbag as a result of seeing the ads in this campaign? $($Please show your calculation process.$)$

$(4$ points$).$ Please calculate the value $($$$)$ of conversions $($i$.$e$.,$ revenue of the campaign$)$ that can be attributed to the display ads. $($Please show your calculation process.$)$

$(4$ points$).$ Please calculate the cost of the whole display ads campaign. $($Please show your calculation process.$)$

$(4$ points$).$ Please calculate ROI for this display ad campaign. $($Please show your calculation process.$)$