subtract quantity from sheet to another after match brand

[KalilMe]

hello
I have two sheets the sheet sale is invoice and sheet the result is stock so what I'm trying subtracting the quantity in sheet result from sheet sale the quantity in sheet sale is column f and in sheet result in column e it should match in sheet sale in column C,D,E with sheet result B,C,D then subtract quantity from sheet sale in column f to sheet result in column e
this is my trying but not work

Sub nn()
Dim sh1, sh2 As Worksheet
Dim rngFound As Range
Set sh1 = Worksheets("sale").Columns(6)
Set sh2 = Worksheets("result")
With sh2.Columns(1)
Set rngFound = .Find(Cells(sh1.Row, 3).Value)
If Not rngFound Is Nothing Then
rngFound(1, 5).Value = rngFound(1, 5).Value - sh1.Value
            End If
    End With
End Sub

the data in sheet sale

item	brand	type	origin	quantity	unit
1	tune	180wg	thi	11	3.00
2	oil	2l	indo	2	5.00

sheet result

item	brand	type	origin	quantity
1	tune	180wg	thi	234
2	oil	2l	indo	123

 

[KalilMe]

any idea to do that?