We each hauled a load and came back for the last one and the horses . We did n't have lunch until five but he treated me at the truck stop on the way home from town . This morning we went in a watched them sell . 31 heifers weighed an average of 820 pounds and brought $ 775 a head .
At what event were the heifers sold ?
Pick the best answer from the following options:
- Tag sale at a silent auction .
 - Livestock auction
 - None of the above choices .
 - Estate sale


Livestock auction