Chart values based on rank

Hello Everyone,

I have following dataset:

Based on that i want to have 3 charts:

1. Chart #1 is to show items order by sold quantity (pieces)

2. Chart #2 and #3 are to show sales of top 1 sold item by shop (#2 chart) and top 2 sold item by shop (#3)

Chart #1 looks like this:

Chart #2 should look like this:

I have written following measure:

Rank of Sold Items = 
CALCULATE(
    MAX(Sheet2[Item]),
    FILTER(
        VALUES(Sheet2[Item]),
        RANKX(
            ALL(Sheet2[Item]),
            SUM(Sheet2[Sold pieces])
        ) = 1
    )
)

but this returns Item #4 that is not ranked as #1. I assume that i should use different function then MAX to return name of top 1 ranked item. 
Could you please help change measure so it returns #1 ranked item?