Find first non-zero value in calculate statement

Hi , ConnieMaldonado 

According to your description, you want to "pick up the first non zero entry for a specific week.".

Here are the steps you can refer to :
(1)My test data is the same as yours.

(2)We can create a measure like this:

Measure = var _cur_value =   SUM('Table'[Value])
var _cur_date = MAX('Table'[Date])
var _t =FILTER( SUMMARIZE(ALLSELECTED('Table'),'Table'[Date] , "value", SUM('Table'[Value])) , [Date]<_cur_date && [value] <>0)
var _max_date =  MAXX(_t,[Date])
var _t2= FILTER(_t,[Date]=_max_date)
return
IF(_cur_value=0 , MAXX(_t2,[value]),_cur_value )

(3)Then we can put the measure on the visual and the result is as follows:

Thank you for your time and sharing, and thank you for your support and understanding of PowerBI! 

Best Regards,

Aniya Zhang

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