Help! Return earliest date with condition in calculated column

Hi fellow PBI'ers

I've spend hours trying to work this out... I've trying to get the earliest instance of a date to calculate cumulative lifetime of a customer.

Basically, I need the earliest start date repeated until the start date is greater than 90 days from the last latest end date (defined as a churned customer).

Hopefully the "Desired result" column makes sense. Where there is "RESET" is where there is a 90 day or greater difference between the current row start date and the previous latest end date. In this instance, it would then use the new start date in the row

Here is what i have so far... 

Getting the previous end date. This is used to determine if if datediff between start date and this column is > 90 days.

Previous_end = 
var account = 'Table'[Account]
var previous_start = 'Table'[Start_Date__c]
var previous_end = 'Table'[End_Date__c]

var last_end_date = //find the last start date
CALCULATE(max('Table'[End_Date__c]),
    FILTER(
        ALL('Table'),
        'Table'[Account] = account &&
        'Table'[End_Date__c] < previous_end))

var fill_end = IF ( last_end_date = blank(), previous_end, last_end_date)

RETURN
fill_end

 Then i tried to find the start dates but it's just pretty much getting the previous rows start date...

earliest_start = 
var account = 'Table'[Account]
var previous_start = 'Table'[Start_Date__c]
var previous_end = 'Table'[End_Date__c]

var first_start_date = //find the last start date
CALCULATE(
    min('Table'[Start_Date__c]),
    FILTER(
        ALL('Table'),
        'Table'[Account] = account &&
        'Table'[Start_Date__c] >= previous_start &&
        datediff( 'Table'[Previous_end], 'Table'[Start_Date__c] , day) < 90 ))
RETURN
first_start_date

Any help would be appreciated and huge life saver!! 🙂