diff --git a/source/_posts/2021/split-bill.md b/source/_posts/2021/split-bill.md
index be4a3f8..a2b7288 100644
--- a/source/_posts/2021/split-bill.md
+++ b/source/_posts/2021/split-bill.md
@@ -61,13 +61,13 @@ const data = new Map();
 for (const { payer, amount, involves } of history) {
   const record = data.fetch(payer);
   record.balance += amount;
-  const dept = Math.ceil(amount / involves.length);
-  // actual payer should not owe extra dept coming from rounded up numbers
-  const payerDept = amount - dept * (involves.length - 1);
-  for (const deptor of involves.map((i) => data.fetch(i))) {
+  const debt = Math.ceil(amount / involves.length);
+  // actual payer should not owe extra debt coming from rounded up numbers
+  const payerDebt = amount - debt * (involves.length - 1);
+  for (const debtor of involves.map((i) => data.fetch(i))) {
     const cost = Math.round(amount / involves.length);
-    deptor.balance -= cost;
-    deptor.consumption += cost;
+    debtor.balance -= cost;
+    debtor.consumption += cost;
   }
 }