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I use these 3 Excel formulas to organize my daily life

=LET (Spend,SUMIF (T_Budget [Category],E2,T_Budget [Cost]),IFS (Spend>F2,"Over budget",Spend=F2,"Budget hit",Spend> (F2*0.9), ...

There are thousands of aligned holes in Peru. Archaeologists now think they know who made them

A fresh look at Monte Sierpe, or “serpent mountain,” may help archaeologists to decipher why ancient people constructed it ...