A labor line multiplies days × rate × quantity, so a blank day count or quantity makes it 0. The line says so (for example "0 · Days?"); enter the missing value, or 1 to count it once.
Use Show only lines missing a rate or quantity on a section to find them all. If the total still looks wrong, open the line's Details & notes and check its calculation.
If the section is marked Not included, its lines do not count in the totals; see Add, include or remove a section.
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