get the sum of unique number from multiple entry

[Datsme_29929]

I have a problem writing the correct formula. In column A, I have a multiple entries of number and in column B are quantity /numbers. I want to get the total quantity/number of a certain number.

[NBVC]

Try:

=SUMIF($A$1:$A$9,$A15,B$1:B$9)

copied to the right if desired for summing of next column.

[Datsme_29929]

Thanks!!!!! you have been very helpful.
Your reply is really appreciated.
What if I do not have the figures in A15? can I just write in the formula what is the specific number I am looking for the total,
THANKS!!!! Yippee

[NBVC]

Yes, like so:

=SUMIF($A$1:$A$9,321,B$1:B$9)

[Datsme_29929]

Thanks
It is a great help .