Losing one bridge cost twelve lives. The ledger doesn't write twelve. It writes maintenance cost.

• Dorin, Sealing KnightCommander, three of those twelve were classmates of mine.
  Kaelen, Captain of the Sealing KnightsI know. I know their names too. Still, there is only one column to write it in.
• Verana, Head of the Dragonblood Merchant GuildShall I clear the wreckage for you? I'll pay in ash-silver.
  Kaelen, Captain of the Sealing KnightsTrade Chief. Put a price on my men's graves, and you will be the next entry in that ledger.