diff --git a/examples/costs/1.j b/examples/costs/1.j
new file mode 100644
index 000000000..635071311
--- /dev/null
+++ b/examples/costs/1.j
@@ -0,0 +1,22 @@
+2022-01-01
+  assets:dollars  $-135
+  assets:euros     €100
+
+comment
+
+$ hledger -f- print -x --infer-cost --infer-equity
+2022-01-01
+    assets:dollars             $-135 @@ €100
+    equity:conversion:$-€:$             $135
+    equity:conversion:$-€:€            €-100
+    assets:euros                        €100
+
+>=
+
+$ hledger -f- print -x --infer-cost --infer-equity | hledger -f- bal -c '$1.'
+               $-135  assets:dollars
+                €100  assets:euros
+                $135  equity:conversion:$-€:$
+               €-100  equity:conversion:$-€:€
+--------------------
+                   0  
diff --git a/examples/costs/2a.j b/examples/costs/2a.j
new file mode 100644
index 000000000..05e2b3ccb
--- /dev/null
+++ b/examples/costs/2a.j
@@ -0,0 +1,22 @@
+2022-01-01
+  assets:dollars  $-135
+  assets:euros     €100 @ $1.35
+
+comment
+
+$ hledger -f- print -x --infer-cost --infer-equity
+2022-01-01
+    assets:dollars                    $-135
+    assets:euros               €100 @ $1.35
+    equity:conversion:$-€:€           €-100
+    equity:conversion:$-€:$         $135.00
+
+>=
+
+$ hledger -f- print -x --infer-cost --infer-equity | hledger -f- bal -c '$1.'
+               $-135  assets:dollars
+                €100  assets:euros
+                $135  equity:conversion:$-€:$
+               €-100  equity:conversion:$-€:€
+--------------------
+                   0  
diff --git a/examples/costs/2b.j b/examples/costs/2b.j
new file mode 100644
index 000000000..f74d2e0bf
--- /dev/null
+++ b/examples/costs/2b.j
@@ -0,0 +1,22 @@
+2022-01-01
+  assets:dollars  $-135
+  assets:euros     €100 @@ $135
+
+comment
+
+$ hledger -f- print -x --infer-cost --infer-equity
+2022-01-01
+    assets:dollars                    $-135
+    assets:euros               €100 @@ $135
+    equity:conversion:$-€:€           €-100
+    equity:conversion:$-€:$            $135
+
+>=
+
+$ hledger -f- print -x --infer-cost --infer-equity | hledger -f- bal -c '$1.'
+               $-135  assets:dollars
+                €100  assets:euros
+                $135  equity:conversion:$-€:$
+               €-100  equity:conversion:$-€:€
+--------------------
+                   0  
diff --git a/examples/costs/3.j b/examples/costs/3.j
new file mode 100644
index 000000000..8c6049b2a
--- /dev/null
+++ b/examples/costs/3.j
@@ -0,0 +1,24 @@
+2022-01-01
+  assets:dollars      $-135
+  equity:conversion    $135
+  equity:conversion   €-100
+  assets:euros         €100
+
+comment
+
+$ hledger -f- print -x --infer-cost --infer-equity
+2022-01-01
+    assets:dollars       $-135 @@ €100
+    equity:conversion             $135
+    equity:conversion            €-100
+    assets:euros                  €100
+
+>=
+
+$ hledger -f- print -x --infer-cost --infer-equity | hledger -f- bal -c '$1.'
+               $-135  assets:dollars
+                €100  assets:euros
+                $135
+               €-100  equity:conversion
+--------------------
+                   0  
diff --git a/examples/costs/4.j b/examples/costs/4.j
new file mode 100644
index 000000000..17eb515bf
--- /dev/null
+++ b/examples/costs/4.j
@@ -0,0 +1,24 @@
+2022-01-01
+  assets:dollars      $-135
+  equity:conversion    $135
+  equity:conversion   €-100
+  assets:euros         €100 @ $1.35
+
+comment
+
+$ hledger -f- print -x --infer-cost --infer-equity
+2022-01-01
+    assets:dollars              $-135
+    equity:conversion            $135
+    equity:conversion           €-100
+    assets:euros         €100 @ $1.35
+
+>=
+
+$ hledger -f- print -x --infer-cost --infer-equity | hledger -f- bal -c '$1.'
+               $-135  assets:dollars
+                €100  assets:euros
+                $135
+               €-100  equity:conversion
+--------------------
+                   0  
diff --git a/examples/costs/README.md b/examples/costs/README.md
new file mode 100644
index 000000000..1cdedd570
--- /dev/null
+++ b/examples/costs/README.md
@@ -0,0 +1,3 @@
+Examples/tests for <https://hledger.org/hledger.html#cost-reporting>.
+
+To run the tests: `shelltest *.j`. Last tested with hledger 1.30.