=DROP(PIVOTBY(TEXT(WEEKNUM(A2:A16,2),"第00周"),HSTACK(WEEKDAY(A2:A16,2),TEXT(A2:A16,"aaa")),C2:C16,SUM,,0,,0,1) ,1)
=DROP(
PIVOTBY(
TEXT(WEEKNUM(A2:A16,2),"第00周"),
HSTACK(WEEKDAY(A2:A16,2),TEXT(A2:A16,"aaa")),
C2:C16,SUM,,0,,0,1)
,1
)