Need help with adjusting/modifying macro to fit my data

Here is the macro vba that inserts a new column on the side and extract the first "expected cost" of each "model" and delete the rest of the rows

Below is the macro vba that I created.

Sub FirstValue()

Dim LastRow As Long
Dim i As Long
LastRow = Cells(Rows.Count, "A").End(xlUp).Row

Range("A1").Offset(0, 1).EntireColumn.Insert
Range("A1").Value = "Model"
Range("A1").Offset(0, 1).Value = "Expected Cost"

'''''   TextToColumns to separate expected cost from model
Range("A2:A" & LastRow).Select
Application.CutCopyMode = False
Selection.TextToColumns Destination:=Range("A2"), DataType:=xlDelimited, _
    TextQualifier:=xlDoubleQuote, ConsecutiveDelimiter:=True, Tab:=False, _
    Semicolon:=False, Comma:=False, Space:=True, Other:=False, FieldInfo _
    :=Array(Array(1, 1), Array(2, 1)), TrailingMinusNumbers:=True
       
'''''   Delete all but the first of each model
For i = LastRow To 2 Step -1
    If Cells(i, 1) = Cells(i - 1, 1) Then Cells(i, 1).EntireRow.Delete
Next i

End Sub

How do I make this code to fit my dataset below?

Model(Editable)			Amount Per Unit(Editable)	Expected QTY(Editable)	Expected Cost(Editable)
WM3370HWA.ABWEPUS               107.                             0.                           4.00
WM3370HWA.ABWEPUS               107.                             3.                         321.00
WM3370HWA.ABWEPUS               107.                             0.                          38.00
WM4270HWA.ABWEPUS               142.                             12.                       1693.00
WM4270HWA.ABWEPUS               142.                             90.                      12721.00
WM8000HWA.ABWEEUS               232.                             5.                        1147.00
WM8000HWA.ABWEEUS               232.                             37.                       8584.00
WM8000HWA.ABWEEUS               232.                             0.                          29.00
WT5680HVA.ASSEPUS               151.                             12.                       1800.00
WT5680HVA.ASSEPUS               151.                             90.                      13519.00
DLEX4270W.ABWEEUS               142.                             7.                         987.00
DLEX4270W.ABWEEUS               142.                             52.                       7384.00
DLEX4270W.ABWEEUS               142.                             0.                          33.00
WT1801HVA.ASSEEUS               102.                             5.                         483.00
WT1801HVA.ASSEEUS               102.                             36.                       3626.00
DLEY1701V.ASSEEUS               113.                             3.                         311.00
DLEY1701V.ASSEEUS               113.                             21.                       2337.00