Power Query - Append Variable Dates to Existing Table as Headers - list

Question

I am having an issue w/ my below M Code. I have set up an simple example of what i am trying to do below, but know the issue is when try to append variable dates as headers into the table:
let
Set up steps.
.
.
.
#"Appended Query" = Table.Combine({#"Removed Other Columns",Table.PromoteHeaders(Table.Transpose(Table.FromList(List.Dates(Date.StartOfWeek(DateTime.Date(DateTime.LocalNow()), Day.Sunday), 52, #duration(7,0,0,0)), Splitter.SplitByNothing(), {"Dates"}, null, ExtraValues.Error)),[PromoteAllScalars=true])})
in
#"Appended Query"
Error:
Expression.Error: 2 arguments were passed to a function which expects 1.
Details:
Pattern=
Arguments=List
The table starts like table A. I use some simple query functions to get to this point. But I need to add the columns w/ dates and the function (Table A: Total Qty/50) for all added date columns as in Table B.
Table A
Product Table A: Total Qty
a 323000
b 898807
c 844945
d 36330
e 281009
f 611092
g 633217
Table B
Product Table A: Total Qty 6/4/2017 6/11/2017 6/18/2017 6/25/2017 7/2/2017 7/9/2017
a 323,000 6,460 6,460 6,460 6,460 6,460 6,460
b 898,807 17,976 17,976 17,976 17,976 17,976 17,976
c 844,945 16,899 16,899 16,899 16,899 16,899 16,899
d 36,330 727 727 727 727 727 727
e 281,009 5,620 5,620 5,620 5,620 5,620 5,620
f 611,092 12,222 12,222 12,222 12,222 12,222 12,222
g 633,217 12,664 12,664 12,664 12,664 12,664 12,664
Hope you can help! Thanks in advance!
Alex