Sum of values from a list from a tinydb

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1

i want to do a sum of values from a list that i call from the tinydb

in Screen3

blocks (12)
blocks (12)1798×638 95.5 KB

code
colintest_4a (1).aia (102.1 KB)

2

Try this way

blocks - 2022-03-31T230536.217
blocks - 2022-03-31T230536.2171506×586 83.7 KB

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