How can I make this code shorter by using Lookup and goto functions cause im really new

[romarkevinruiz]

Sub buyme()
Dim a As Integer
Dim b As Integer
Dim c As String
Dim d As String
Dim e As Integer
Dim f As Integer
Dim g As Integer
Dim h As Integer
Dim j As Integer
Dim i As Integer
Dim k As Integer
Do
a = Application.InputBox("Enter Item Number", "Item Code", 0)
If a = Range("A2") Then
b = Application.InputBox("Enter Item Quantity", "Lenovo Vibe X", 0)
d = MsgBox("Price: " & Range("C2"), vbOKOnly)
ElseIf a = Range("A3") Then
b = Application.InputBox("Enter Item Quantity", "Samsung Galaxy Mega", 0)
d = MsgBox("Price: " & Range("C3"), vbOKOnly)
ElseIf a = Range("A4") Then
b = Application.InputBox("Enter Item Quantity", "Sony Xperia 21", 0)
d = MsgBox("Price: " & Range("C4"), vbOKOnly)
ElseIf a = Range("A5") Then
b = Application.InputBox("Enter Item Quantity", "LG Nexus", 0)
d = MsgBox("Price: " & Range("C5"), vbOKOnly)
ElseIf a = Range("A6") Then
b = Application.InputBox("Enter Item Quantity", "HTC One Max", 0)
d = MsgBox("Price: " & Range("C6"), vbOKOnly)
ElseIf a = Range("A7") Then
b = Application.InputBox("Enter Item Quantity", "Huawei Ascend P6", 0)
d = MsgBox("Price: " & Range("C7"), vbOKOnly)
ElseIf a = Range("A8") Then
b = Application.InputBox("Enter Item Quantity", "Blackberry Q10", 0)
d = MsgBox("Price: " & Range("C8"), vbOKOnly)
ElseIf a = Range("A9") Then
b = Application.InputBox("Enter Item Quantity", "MSI Primo", 0)
d = MsgBox("Price: " & Range("C9"), vbOKOnly)
ElseIf a = Range("A10") Then
b = Application.InputBox("Enter Item Quantity", "Samsung Galaxy Note 8.0", 0)
d = MsgBox("Price: " & Range("C10"), vbOKOnly)
ElseIf a = Range("A11") Then
b = Application.InputBox("Enter Item Quantity", "Huawei Media Pad 10 Link", 0)
d = MsgBox("Price: " & Range("C11"), vbOKOnly)
End If
If a = Range("A2") Then
i = b * Range("C2")
ElseIf a = Range("A3") Then
i = b * Range("C3")
ElseIf a = Range("A4") Then
i = b * Range("C4")
ElseIf a = Range("A5") Then
i = b * Range("C5")
ElseIf a = Range("A6") Then
i = b * Range("C6")
ElseIf a = Range("A7") Then
i = b * Range("C7")
ElseIf a = Range("A8") Then
i = b * Range("C8")
ElseIf a = Range("A9") Then
i = b * Range("C9")
ElseIf a = Range("A10") Then
i = b * Range("C10")
ElseIf a = Range("A11") Then
i = b * Range("C11")
End If
k = k + i
c = MsgBox("Another", vbYesNo)
Loop While c = vbYes
If c = vbNo Then
e = MsgBox("Total Price: " & k, vbOKOnly)
g = Application.InputBox("Payment", vbOKOnly)
j = g - k
h = MsgBox("Change: " & j, vbOKOnly)
End If
End Sub