#include <file.au3>
#include <String.au3>
Dim $aRecords
_FileReadToArray(@ScriptDir & "\Test1.txt", $aRecords)
$Sum = 0
For $i = 1 To $aRecords[0]
$aMin = _StringBetween($aRecords[$i], "Пауза ", " мин", -1)
$Sum += $aMin[0]
Next
MsgBox(64, "Сумма", $Sum & " минут")