diff --git a/hledger-lib/Hledger/Data/Amount.hs b/hledger-lib/Hledger/Data/Amount.hs
index f38071ea6..94b603127 100644
--- a/hledger-lib/Hledger/Data/Amount.hs
+++ b/hledger-lib/Hledger/Data/Amount.hs
@@ -781,11 +781,11 @@ mixedAmountUnstyled = mapMixedAmountUnsafe amountUnstyled
 showMixedAmount :: MixedAmount -> String
 showMixedAmount = wbUnpack . showMixedAmountB noColour
 
--- | Get the one-line string representation of a mixed amount.
+-- | Get the one-line string representation of a mixed amount (also showing any costs).
 --
 -- > showMixedAmountOneLine = wbUnpack . showMixedAmountB oneLine
 showMixedAmountOneLine :: MixedAmount -> String
-showMixedAmountOneLine = wbUnpack . showMixedAmountB oneLine
+showMixedAmountOneLine = wbUnpack . showMixedAmountB oneLine{displayPrice=True}
 
 -- | Like showMixedAmount, but zero amounts are shown with their
 -- commodity if they have one.
diff --git a/hledger-lib/Hledger/Data/Balancing.hs b/hledger-lib/Hledger/Data/Balancing.hs
index 3e3e25f66..086cae68d 100644
--- a/hledger-lib/Hledger/Data/Balancing.hs
+++ b/hledger-lib/Hledger/Data/Balancing.hs
@@ -118,11 +118,11 @@ transactionCheckBalanced BalancingOpts{commodity_styles_} t = errs
         rmsg
           | rsumok        = ""
           | not rsignsok  = "The real postings all have the same sign. Consider negating some of them."
-          | otherwise     = "The real postings' sum should be 0 but is: " ++ showMixedAmountOneLine rsumcost
+          | otherwise     = "The real postings' sum should be 0 but is: " ++ showMixedAmountOneLineWithoutPrice False rsumcost
         bvmsg
           | bvsumok       = ""
           | not bvsignsok = "The balanced virtual postings all have the same sign. Consider negating some of them."
-          | otherwise     = "The balanced virtual postings' sum should be 0 but is: " ++ showMixedAmountOneLine bvsumcost
+          | otherwise     = "The balanced virtual postings' sum should be 0 but is: " ++ showMixedAmountOneLineWithoutPrice False bvsumcost
 
 -- | Legacy form of transactionCheckBalanced.
 isTransactionBalanced :: BalancingOpts -> Transaction -> Bool