diff --git a/samples/insufficient_funds.csv b/samples/insufficient_funds.csv
new file mode 100644
index 0000000..befb869
--- /dev/null
+++ b/samples/insufficient_funds.csv
@@ -0,0 +1,6 @@
+type,       client, tx, amount
+deposit,         1,  1,    1.0
+deposit,         2,  2,    2.0
+deposit,         1,  3,    2.0
+withdrawal,      1,  4,    1.5
+withdrawal,      2,  5,    3.0
diff --git a/samples/simple.csv b/samples/simple.csv
new file mode 100644
index 0000000..59d82e3
--- /dev/null
+++ b/samples/simple.csv
@@ -0,0 +1,6 @@
+type,       client, tx, amount
+deposit,         1,  1,    1.0
+deposit,         2,  2,    2.0
+deposit,         1,  3,    2.0
+withdrawal,      1,  4,    1.5
+withdrawal,      2,  5,    2.0