Open the document, input some values to first and second field as described.
xform_sum.odt (application/vnd.oasis.opendocument.text), 9.61 KB, created by Robert Großkopf on 2018-03-17 15:50:28 UTC
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Creator: Robert Großkopf
Created: 2018-03-17 15:50:28 UTC
Size: 9.61 KB

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Attachments on bug 116451: 140674