Pause Calculation

function(signInDate, signOutDate, PauseOptions, PauseOptionId, isSignInTimeSelected, isSignOutTimeSelected) {
      // Calculate number of hours employee has worked for
      var signInDate    = new Date(signInDate),
          signOutDate   = new Date(signOutDate),
          signInOffset  = isSignInTimeSelected ? 0 : signInDate.getTimezoneOffset() * 60 * 1000,
          signOutOffset = isSignOutTimeSelected ? 0 : signOutDate.getTimezoneOffset() * 60 * 1000,
          diff          = signOutDate - signInDate + signOutOffset - signInOffset,
          pause         = 0,
          workingMinutes,
          workingHours,
          workingMinutesResidue;

      if (PauseOptionId) {
        for (var i = 0; i < PauseOptions.length; i++) {
          if (PauseOptions[i].Id === PauseOptionId) pause = PauseOptions[i].NumberOfMinutes;
        }
      }

      workingMinutes        = diff < 0 ? 0 : (diff / 60 / 1000);
      workingHours          = diff < 0 ? 0 : Math.floor((workingMinutes - pause) / 60);
      workingMinutesResidue = Math.round((workingMinutes - pause) % 60);

      // workingMinutesResidue = workingMinutesResidue < 30 ? '00' : '50';
      workingMinutesResidue = workingMinutesResidue < 0 ? '00' : workingMinutesResidue;
      workingMinutesResidue = workingMinutesResidue.toString().length === 1 ? ('0' + workingMinutesResidue) : workingMinutesResidue;

      return {
        workingMinutes: workingMinutes,
        workingHours: workingHours,
        workingMinutesResidue: workingMinutesResidue
      };
    }