How to find Ticket Backlog?

So is this one not working?

Backlogs = CALCULATE(
                     COUNTA('Backlogs'[Tickets]),
                     FILTER(
                           ALL('Calendar'[Date]),
                           'Calendar'[Date]<MIN('Calendar'[Date]
                           )
                       )
                    ) - (
             	CALCULATE(
                       COUNTA('Backlogs'[Tickets]) ,
                      	USERELATIONSHIP('Backlogs'[Closed On],'Calendar'[Date]),
			FILTER(
				ALL('Calendar'[Date]),
				'Calendar'[Date] < MIN('Calendar'[Date])
				 )
		            ,FILTER('Backlogs','Backlogs'[Closed Tickets] <> BLANK())		 )
		 )

Hi, Phil,

I am researching how to use PowerBI to derive Incident Created (New), Resolved and Backlog by period specified and I come across your suggestion here. I had adopted your suggestion. However, it doesn't really work for Resolved and Backlog and I hope you can help me on this.

Here is the result with your suggested formula.

I did a validation Created (New), the figures tally, sreen shot below. As for Resolved, it is not, I think it has something to do with the filter or date. For Backlog, it is not something that I am looking for. I am searching for a DAX that can calculate backlog and be able to count itself as backlog across its lifecycle until the end of it (Resolved). For example, a ticket A123456 created on 5 November 2016 and resolved on 16 April 2017, when I plot or tabulate Backlog by period, let say by month, the expected result is this ticket should count itself a backlog in November 2016, December, Januray, February and March 2017.

Let me paste/send over the data set for your reference. Hope you could shed some light here. Data set as follow

https://1drv.ms/u/s!AiwAA0c-XzPHgSSRl53z-_elVLtS

I'm trying to solve this same problem. Was this ever resolved?