Need a chart type to display turn around time for code requests received during the month

I need to display on the dashboard the following details every month need some idea on how to plot the data and use the best fit chart for this data Data to report - Number of EAP and EDG requests received Number of these requests pending and Average tu around time for these requests to be processed.

I've used this formula to calculate the tu around time for each request processed example 3 requests rec'd date is 5/1/2016 and processed date is 5/10/16 so tu around time equals 9 days any help you could provide will be appreciated [email protected]