diff --git a/index.js b/index.js
index b580ded..b97c493 100644
--- a/index.js
+++ b/index.js
@@ -142,7 +142,7 @@ function splitPostpaidDetail(str) {
 }
 
 function calculateBaseBillAmount(detailSplitted, customKeywords) {
-    const keywords = customKeywords || ['TAGIHAN', 'DENDA', 'RPPREMI', 'BIAYA'];
+    const keywords = customKeywords || ['TAGIHAN', 'DENDA', 'RPPREMI', 'BIAYA', 'TOTALTAGIHAN'];
 
     let retval = 0;
     let detailCount = (detailSplitted || []).length;
@@ -150,7 +150,8 @@ function calculateBaseBillAmount(detailSplitted, customKeywords) {
     for (let i = 0; i < detailCount; i += 1) {
         const item = detailSplitted[i];
         if (keywords.indexOf(item.keyword.toUpperCase()) >= 0) {
-            retval += Number(item.value) || 0;
+            const value = (item.value || '').trim().replace(/^rp */i, '').replace(/\./g, '');
+            retval += Number(value) || 0;
         }
     }