Troubleshooter of Error: Automatically fill in a column based on information in other colums

Automatically fill in a column based on information in other colums

This is what I'm trying to do automatically as I have tens of thousands of lines (using an example to make it simple):
 
I have a download of order history that contains one line for each SKU on the order.  I want to be able to catorgorize them based on the SKU.  In this example, Apples are on special.  I need to know the total number of orders, the number of orders where
only the apples were bought and finally the total number of orders where apples plus an additional product was bought.  What can I do to automatically assign a type (column C) to the row based on the above scenarios? 
 

 
A
B
C

1
Order#
SKU
Type

2
1001
apple
Special plus

3
1001
banana
Special plus

4
1001
orange
Special plus

5
1002
apple
Special plus

6
1002
banana
Special plus

7
1003
apple
Special

8
1004
pear
No special

9
1005
apple
Special plus

10
1005
pear
Special plus

11
1006
banana
No special

12
1006
orange
No special

13
1006
grape
No special

14
1006
pear
No special

Keys to the Problem Automatically fill in a column based on information in other colums

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Hi,
 
Try this formula in cell D2 and copy down
 
=IF(COUNTIF($A$2:$A$14,A2)>1,IF(COUNTIFS($A$2:$A$14,A2,$B$2:$B$14,"apple")>=1,"Special Plus","No Special"),IF(B2="apple","Special","No Special"))
 
Given 65000 rows of data, there will be performance issues, so please copy and paste in chunks.
 
Hope this helps.

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