diff --git a/Community-Developed-Custom-Scripts.md b/Community-Developed-Custom-Scripts.md
index c6fa886..8d2e065 100644
--- a/Community-Developed-Custom-Scripts.md
+++ b/Community-Developed-Custom-Scripts.md
@@ -85,6 +85,29 @@ frappe.ui.form.on("Dropbox Backup", "refresh", function(frm){
 ```
 
 ***
+### Calculating Values in Child Tables
+
+to calculate the values of child tables, you can use the following functions:
+```
+frappe.ui.form.on("[CHILD TABLE DOCTYPE]", {
+	[CHILDTABLEMULTIPLE1]: function(frm, cdt, cdn) {
+		var d = locals[cdt][cdn];
+		var total = 0;
+		frappe.model.set_value(d.doctype, d.name, "[CHILDTABLEPRODUCT]", d.[CHILDTABLEMULTIPLE1] * d.[CHILDTABLEMULTIPLE2]);
+        frm.doc.[CHILDTABLEFIELDINPARENT].forEach(function(d) { total += d.[CHILDTABLEPRODUCT]; });
+        frm.set_value('[PARENTDOCTYPETOTALFIELD]', total);
+	}
+});
+frappe.ui.form.on("[CHILD TABLE DOCTYPE]", {
+	[CHILDTABLEMULTIPLE2]: function(frm, cdt, cdn) {
+		var d = locals[cdt][cdn];
+		var total = 0;
+		frappe.model.set_value(d.doctype, d.name, "[CHILDTABLEPRODUCT]", d.[CHILDTABLEMULTIPLE1] * d.[CHILDTABLEMULTIPLE2]);
+        frm.doc.[CHILDTABLEFIELDINPARENT].forEach(function(d) { total += d.[CHILDTABLEPRODUCT]; });
+        frm.set_value('[PARENTDOCTYPETOTALFIELD]', total);
+	}
+});
+```
 ### Fetch child table
 
 The following fetches all entries in a child table from another document.