(6)   Earnings (Loss) Per Common Share

Basic earnings (loss) per common share ("EPS") is computed by dividing net earnings (loss) by the weighted average number of common shares outstanding ("WASO") for the period. Diluted EPS presents the dilutive effect on a per share basis of potential common shares as if they had been converted at the beginning of the periods presented. Potentially dilutive shares are excluded from the computation of diluted EPS during periods in which losses are reported since the result would be antidilutive.

Series A and Series B QVC Group Common Stock

Excluded from diluted EPS for the three months ended March 31, 2018 and 2017, are 11 million and 14 million potential common shares, respectively, because their inclusion would have been antidilutive.

Series A and Series B Liberty Ventures Common Stock

Excluded from diluted EPS for the three months ended March 31, 2018 and 2017 were 2 million and less than a million potential common shares, respectively, because their inclusion would have been antidilutive.