Sum Values on Sheet with Multiple Rows of Headers

[chrisboughter]

Information on Sheet1

Header1;Header2;Header3
11;12;13
Header1;Header2;Header3
21;22;23
Header1;Header2;Header3
31;32;33

There will be more sets of this same data added to the sheet on a weekly basis. Every time there is a new set of this data, I want to sum it.
_________________________________
Desired Result in Separate "Totals" Area (or Sheet):

Header1;Header2;Header3
63;66;69

(I would not have set up the information needing to be totalled in this way. I would have set up the information needing to be totalled in a way that would have been easy to total. I thank you in advance for your time and consideration. And, for what it's worth, I never take credit for these sorts of things I can't figure out on my own. I always let them know from where I got it. )