What are your expected results in the two cells containing question marks (????) and why?

Excel 2016 (Windows) 32 bit
B
C
D
E
3
ITEM NUMBER
ITEM DESCRIPTION
Total Qty sold
12 months before the last 12 months
4
8888
ORANGES
20
????
5
9999
APPLES
27
????
6
Grand Total
47
Sheet: Sheet4