How to sum entries that have same ID OpenOffice - Calc -

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i have spreadsheet similar 1 in screenshot. current data

from want sum entries in data 2 have same data 1 id , store in column. this:

the end result

i not able figure out formula this. figured out how column unique entries need figure out how sum of values have same data 1 id.

can point me in right direction?

you can use sumif, e.g. if i'm reading sheet right, =sumif(a$2:a$7, a11, b$2:b$7), , copy down. sums values b2-b7 whenever corresponding value in a2-a7 matches a11.

you can find more on sumif here.

sumif example


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