Consolidate several rows into a single row vba - vba

Question

I need to create a sub to consolidate some data. I have several rows (anywhere from 4k to 20k) that I need to consolidate and sum the values from each column (from C to N).
The input data looks like this:
input
For the output, it should sum the columns for each SKU (Column A) and delete the rest.
Like this:
output
It should be simple enough, but I can’t seem to come up with an appropriate solution. I tried using an array with a scripting dictionary but I can’t figure out how to store more than a single value for each key. Sample (unfinished) code:
Dim sArray As Variant
Dim dict As Object
Set dict = CreateObject("Scripting.Dictionary")
sArray = Range(currentRange).Value
For i = 1 To UBound(sArray, 1)
For j = 3 To UBound(sArray, 2)
If dict.exists(sArray(i, 1)) = False Then
dict.Add sArray(i, 1), sArray(i, j)
Else
'this part is very wrong:
dict(sArray(i, 1)) = dict(sArray(i, j)) + sArray(i, j)
End If
Next
Next
Thank you very much in advance!

Answer 1

Try this, It sums the values in Column Q:AB then paste them back and removes the duplicates.
Sub dupremove()
Dim ws As Worksheet
Dim lastrow As Long
Set ws = Sheets("Sheet12") ' Change to your sheet
With ws
lastrow = .Range("A" & .Rows.Count).End(xlUp).Row
With .Range("C2:N" & lastrow)
.Offset(, 14).FormulaR1C1 = "=SUMIF(C1,RC1,C[-14])"
.Value = .Offset(, 14).Value
.Offset(, 14).ClearContents
End With
With .Range("A1:N" & lastrow)
.Value = .Value
.RemoveDuplicates 1, xlYes
End With
End With
Before:
After:

Answer 2

I came up with the following solution instead and it took 30 seconds to run it (not entirely my own idea, borrowed some code from someplace else):
Sub dupes()
Dim MyRange As Range
Dim RowNum As Long
RowNum = 1
With Application
.ScreenUpdating = False
.EnableEvents = False
End With
Set MyRange = Range("A2:N14200") 'for test only, on the real sub it's dynamic
MyRange.Sort key1:=Range("A2"), order1:=xlAscending
For Each Row In MyRange
With Cells
While Cells(RowNum, 1) = Cells(RowNum + 1, 1) And Cells(RowNum + 1, 1) <> "" 'very important the second condition or it will continue to loop forever
For i = 3 To 14
Cells(RowNum, i) = Cells(RowNum, i) + Cells(RowNum + 1, i)
Next
Rows(RowNum + 1).EntireRow.Delete
Wend
End With
RowNum = RowNum + 1
Next
With Application
.ScreenUpdating = True
.EnableEvents = True
End With
End Sub
It's kinda messy but it does the trick. Thanks to everyone!