diff --git a/MSKIM/21to30/29.py b/MSKIM/21to30/29.py
new file mode 100644
index 0000000..8405262
--- /dev/null
+++ b/MSKIM/21to30/29.py
@@ -0,0 +1,13 @@
+def solution(enroll,referral,seller,amount):
+    parent=dict(zip(enroll.referral))
+    total={name:0 for name in enroll}
+
+    for i in range(len(seller)):
+        money=amount[i]*100
+        cur_name=seller[i]
+        while money>0 and cur_name!="-":
+            total[cur_name]+=money-money//10
+            cur_name=parent[cur_name]
+            money//=10
+
+    return [total[name] for name in enroll]
\ No newline at end of file