Visual Level Filter a Measure

Evening,

I have a bar chart with the axis as a date and the value as a measure for the Sum of Net Sales in the past week.

When I add a visual level filter of a created conditional column (text value) the graph goes blank. It works when I use the Net Sales value from the column, so I feel it's an issue with my measure.

P0WNetSales = 
VAR CurrentYear =
MAX ( 'ExtendedCalendar'[Year] )
VAR CurrentWeekNum =
CALCULATE (
MAX ( 'ExtendedCalendar'[WeekNum] ) - 0, FILTER(ALL( 'ExtendedCalendar' ), 'ExtendedCalendar'[Year] = CurrentYear )
)
RETURN

CALCULATE (
SUM('itemdetailsdogfood$'[Net Sales]),

'ExtendedCalendar'[Year] = CurrentYear,
'ExtendedCalendar'[WeekNum]
= CurrentWeekNum
)

Any thoughts? I'm completly out of ideas.